51. Animal Liberation
by Singer, Peter 
Price: USD 7.32
Dealer: ZVAB, Wonder Book
Description: ISBN10: 0940322005, ISBN13: 9780940322004, [publisher: New York Review Books] Hardcover Good condition. Very Good dust jacket. A copy that has been read but remains intact. May contain markings such as bookplates, stamps, limited notes and highlighting, or a few light stains. [Frederick, MD, U.S.A.] [Publication Year: 1990]  

52. Animal Liberation
by Singer 
Price: USD 16.00
Dealer: Abebooks, The Roving Eye
Description: ISBN10: 0940322005, ISBN13: 9780940322004, [publisher: Random House] Hardcover Discourse on ending the human tyranny over the animal world and establishment of animal rights [Silver Spring, MD, U.S.A.] [Publication Year: 1990]