New York: Grosset & Dunlap, 1933. Valentine, A.C. First edition, first printing. Hardcover. Item #27702
The first book in the four volume "Adventures in the Unknown" series. "...One of the two authors writing before Heinlein (the other is Roy Rockwood) whose imagination and storytelling ability still stand out." Barron: Anatomy of Wonder 1987, 5-36. Bound in original blue cloth with lettering stamped in black. Illustrated endpapers. Fine in near fine, bright dust jacket with just a hint of wear to the spine panel ends and several tiny closed tears with associated creases. A handsome copy.