Chicago: Ziff-Davis Publishing Co., 1947. Paperback. 178 p.: illustrations; 25 cm. Front cover art by Julian S. Krupa; illustrations by Malcolm Smith, Enoch Sharp, and Julian S. Krupa. Contents: Hidden City by Chester S. Geier; Treasure Derelict by Guy Archette; The Weapon by Robert Moore Williams; The Vanishing Spaceman by... More about Amazing Stories July 1947 Volume 21 Number 7