Back cover by James B. Settles illustrates Glider of Ganymede
Back cover by James B. Settles illustrates Sailing Ship of Venus
A Giant Calculating Machine Decides To Rule The World
A Thrilling Story Of Scientific Adventure On The Planet Pluto
Silly old sci-fi, referring to Pluto as a planet!
The Gigantic Jewel Was A Gateway To Hell
Also includes The Huntress Of Akkan, and the back cover by James B. Settles illustrates Trade Your Trouble For A Bubble
The world of tomorrow may see science progress to the point where mankind will have a great deal more time for amusement than ever before. A great amusement enterprise may grow up. Here is one possibility for pleasure in the future, a giant pleasure ball that rolls along a thousand-mile scenic route.