Doubleday Books 1950 First edition. Hard cover Very good in very good dust jacket. Signed by author. Sewn binding. Cloth over boards. 408 p. Macmillan, NY. 1950. Hardcover. Condition: Near fine. First Edition. Signed by the author on the title page. Near fine in very good DJ. Blue cloth, DJ faded on the spine edges. Square and firmly bound with clean pages. According to the Preface, "Worlds in Collision is a book of wars in the celestial sphere that took place in historical times." Through the years, historians have brought into question Velikovsky's credewntials, but an important book nonetheless Signed by the author.