1. Semper Mars: Book One of the Heritage Trilogy (Heritage Trilogy, 1)
by Douglas, Ian 
Price: USD 1.57
Dealer: Alibris, Good Books Will Follow via Alibris
Description: Harper Voyager 1998 Trade paperback Good Fast Shipping-Safe and Secure Poly Mailer! 

2. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.23
Dealer: Alibris, ThriftBooks-Dallas via Alibris
Description: Harper Voyager Softcover Good Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less. 

3. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.36
Dealer: Alibris, Gulf Coast Books via Alibris
Description: Harper Voyager 1998-05-01 Mass Market Paperback Fair Size: 4x0x6; 

4. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.59
Dealer: Alibris, HPB-Emerald via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

5. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.59
Dealer: Alibris, HPB-Ruby via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

6. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.59
Dealer: Alibris, Half Price Books Inc via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

7. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.59
Dealer: Alibris, HPB-Diamond via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

8. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.59
Dealer: Alibris, HPB Inc. via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

9. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.59
Dealer: Alibris, HPB Inc. via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

10. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.59
Dealer: Abebooks, HPB-Ruby
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager] Softcover Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! [Dallas, TX, U.S.A.] [Publication Year: 1998]  

11. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.59
Dealer: Abebooks, HPB Inc.
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager] Softcover Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! [Dallas, TX, U.S.A.] [Publication Year: 1998]  

12. Semper Mars
by Douglas, Ian 
Price: USD 2.76
Dealer: Alibris, New & Olde Pages via Alibris
Description: Harper Voyager 1998 Paperback GOOD Paperback-9780380788286 HERITAGE #1 [DOUGLAS, IAN] SEMPER MARS. 

13. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, HPB-Emerald via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

14. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, HPB-Ruby via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

15. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, HPB-Ruby via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

16. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, Half Price Books Inc via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

17. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, Half Price Books Inc via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

18. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, Half Price Books Inc via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

19. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, Half Price Books Inc via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

20. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, HPB-Diamond via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

21. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, HPB-Diamond via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

22. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, HPB-Diamond via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

23. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, HPB Inc. via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

24. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, HPB Inc. via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

25. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Alibris, HPB Inc. via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

26. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Abebooks, Half Price Books Inc.
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager] Softcover Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! [Dallas, TX, U.S.A.] [Publication Year: 1998]  

27. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Abebooks, HPB Inc.
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager] Softcover Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! [Dallas, TX, U.S.A.] [Publication Year: 1998]  

28. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Abebooks, HPB-Ruby
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager] Softcover Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! [Dallas, TX, U.S.A.] [Publication Year: 1998]  

29. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Abebooks, HPB-Diamond
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager] Softcover Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! [Dallas, TX, U.S.A.] [Publication Year: 1998]  

30. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 2.92
Dealer: Abebooks, HPB-Emerald
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager] Softcover Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! [Dallas, TX, U.S.A.] [Publication Year: 1998]  

31. Semper Mars 1 Heritage Trilogy
by Ian Douglas 
Price: USD 2.99
Dealer: Biblio, Firefly Bookstore LLC
Description: Harper Voyager, May Date: 1998. Mass Market Paperback . Used Good. We carry new and used books in our storefront. We want you to be satisfied with your purchase. Please contact us if you have questions regarding this item. 1998. Harper Voyager ISBN 0380788284 9780380788286 [US] 

32. Semper Mars: Book One of the Heritage Trilogy (Heritage Trilogy, 1, Band 1)
by Douglas, Ian: 
Price: USD 2.99
Dealer: ZVAB, Antiquariat Buchhandel Daniel Viertel
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager] Softcover 384 S. In gutem Zustand. 29659 ISBN 9780380788286 Sprache: Englisch Gewicht in Gramm: 186 mass_market, Maße: 10.64 cm x 2.44 cm x 17.15 cm [Diez, Germany] [Publication Year: 1998]  

33. Semper Mars 1 Heritage Trilogy
by Ian Douglas 
Price: USD 2.99
Dealer: Abebooks, Firefly Bookstore
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager May 1998] Softcover Firefly sells new and used books through our store front. We try to add a detailed description to as many titles as possible. If you have questions regarding this title, please contact us. Photos available on request. [Kutztown, PA, U.S.A.] [Publication Year: 1998]  

34. Semper Mars Heritage Trilogy vol. 1
by Ian Douglas 
Price: USD 3.00
Dealer: Biblio, Borderlands Books
Description: Eos, Date: 1998. Later Edition. Mass Market (i.e. 4 by 7 inch softcover). N/A (volume is softcover). Used 1998. Eos ISBN 0380788284 9780380788286 [US] 

35. Semper Mars: Book One of the Heritage Trilogy (Heritage Trilogy, 1, Band 1)
by Douglas, Ian: 
Price: USD 3.33
Dealer: AbebooksDE, Antiquariat Buchhandel Daniel Viertel
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager] Softcover 384 S. In gutem Zustand. 29659 ISBN 9780380788286 Sprache: Englisch Gewicht in Gramm: 186 mass_market, Maße: 10.64 cm x 2.44 cm x 17.15 cm [Diez, Germany] [Publication Year: 1998]  

36. Semper Mars: Book One of the Heritage Trilogy: Book 1
by Douglas, Ian 
Price: USD 3.34
Dealer: ZVAB, WorldofBooks
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager] Softcover The book has been read, but is in excellent condition. Pages are intact and not marred by notes or highlighting. The spine remains undamaged. [Goring-By-Sea, WS, United Kingdom] [Publication Year: 1998]  

37. Semper Mars: Book One of the Heritage Trilogy
by Ian Douglas 
Price: USD 3.50
Dealer: Biblio, R Bookmark
Description: Harper Voyager, May Date: 1998. Mass Market Paperback. Used - Acceptable. Shelf and spine wear -- reader's copy. 1998. Harper Voyager ISBN 0380788284 9780380788286 [US] 

38. Semper Mars: Book One of the Heritage Trilogy
by Ian Douglas 
Price: USD 3.50
Dealer: Abebooks, R Bookmark
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager May 1998] Softcover Shelf and spine wear -- reader's copy. [Youngtown, AZ, U.S.A.] [Publication Year: 1998]  

39. Heritage Trilogy, The #1 - Semper Mars (Science Fiction Novels (Avon Books))
by Ian Douglas 
Price: USD 3.50
Dealer: Abebooks, Noble Knight Games
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Avon Books] Softcover Avon Books Science Fiction Novels (Avon Books) Heritage Trilogy, The #1 - Semper Mars (EX)Manufacturer: Avon BooksProduct Line: Science Fiction Novels (Avon Books)Type: Novel - SoftcoverCopyright Date: 1998Author: Ian DouglasPage Count: 376Please review the condition and any condition notes for the exact condition of this item. All pictures are stock photos. The condition of the item you will receive is EX. Our grading system is explained in the terms of sale section of our bookseller page. Please feel free to contact us with any questions. Product Description:Heritage Trilogy #1 - Semper Mars Softcover Novel [Fitchburg, WI, U.S.A.] [Publication Year: 1999]  

40. Semper Mars: Book One of the Heritage Trilogy: Book 1
by Douglas Ian 
Price: USD 3.56
Dealer: Biblio, World of Books Ltd
Description: Paperback. Good. ISBN 0380788284 9780380788286 [GB] 

41. Semper Mars: Book One of the Heritage Trilogy: Book 1
by Douglas Ian 
Price: USD 3.56
Dealer: Biblio, World of Books Ltd
Description: Paperback. Very Good. ISBN 0380788284 9780380788286 [GB] 

42. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 3.59
Dealer: Alibris, HPB-Ruby via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

43. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 3.59
Dealer: Alibris, HPB-Ruby via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

44. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 3.59
Dealer: Alibris, HPB-Ruby via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

45. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 3.59
Dealer: Alibris, HPB-Ruby via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

46. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 3.59
Dealer: Alibris, Half Price Books Inc via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

47. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 3.59
Dealer: Alibris, HPB-Diamond via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

48. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 3.59
Dealer: Alibris, HPB Inc. via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

49. Semper Mars: Book One of the Heritage Trilogy: Book 1
by Douglas, Ian 
Price: USD 3.61
Dealer: AbebooksUK, WorldofBooks
Description: ISBN10: 0380788284, ISBN13: 9780380788286, [publisher: Harper Voyager] Softcover The book has been read, but is in excellent condition. Pages are intact and not marred by notes or highlighting. The spine remains undamaged. [Goring-By-Sea, WS, United Kingdom] [Publication Year: 1998]  

50. Semper Mars: Book One of the Heritage Trilogy
by Douglas, Ian 
Price: USD 3.99
Dealer: Alibris, HPB-Diamond via Alibris
Description: Harper Voyager 1998 Mass Market Paperback Good Connecting readers with great books since 1972. Used books may not include companion materials, some shelf wear, may contain highlighting/notes, and may not include cd-rom or access codes. Customer service is our top priority!