Biggle, Jr., Lloyd. The Angry Espers.
Lowndes, Robert A. W.. The Puzzle Planet.
New York: published by Ace Books, Inc. 1961.
Small octavo, pictorial wrappers. Ace double #D-485. First printings and first publications. Very light wear to covers, light wear to edges and corners, price in pen on both covers; wear to spine corners, stress crease to spine; light age tanned end pages; light age tanned text pages; Very Good.