This 7 inch by 10 inch publication has 146 pages. Features 6 Sci-Fi Stories, and 9 regular features. The stories are; Slave Raiders from Mercury by Don Wilcox, Warlords of Mars, by Festus Pragnell, Trapped on Titan by David Wright O'Brien. The Mathematical Kid by Ross Rocklynne. Treachery on Planetoid 41 by Floyd Gale. Planet of Black Terror by Ed Earl Repp. Has a special feature, When Meteorites Crash Illustrated on the back. Published by Ziff-Davis Publishing, June, 1940. Great ads! Minor water damage at bottom edge. All is intact and readable. Minor tattering along edges. Over all good condition. A Sci-Fi collectors must! PLEAE ADD $3.00 SHIPPING.