Action Comics 1938 #321 - 3.0 - $12.00

The Thiefmasters trap Superman on a red sun world where all the other inhabitants have super-powers and plan to attack Earth unless the powerless Superman can stop them.

A blood transfusion gives Linda's friend Debbie super-powers, but also affects her sanity, causing her to turn evil and impersonate Supergirl.

On-sale date from ad in Superman's Girl Friend, Lois Lane #55 and copyright registration.

• Superboy Says: "Don't Give Fire a Place to Start!" - Inside front cover.
• Superman -- Weakest Man in the World! - Introduces the Thorones, an alien race that is super-powered under suns of any color.
• - On the page between page 6 and page 7 of the previous story sequence.
• Coming Your Way in '65 - The Greatest Superman Products Ever! - On the page between page 8 and page 9 of the previous story sequence.
• - Statement of October 1, 1964 No circulation information given. Owners: National Periodical Publications, Inc,. Harry Donenfeld, J.S. Liebowitz, P.H. Sampliner, Irwin Donenfeld, S.U. Sampliner, Sonia Iger, all at 575 Lexington Avenue, New York, N.Y.
• - letters submitted by Jeff Morris, Michael E. Colby, Tom Rusk, Gordon Hayes, Ursula Meyers, Chip Oat, James Hartman, and Karen Rizzo.
• - On the page between page 4 and page 5 of the previous story sequence.
• - house ad for 80 Page Giant (DC, 1964 series) #5 (Batman), #6 (Superman), and #7 (Sgt. Rock's Prize Battle Tales); on the page between page 6 and page 7 of the previous story sequence
• Strange Worlds Superman Has Visited - Summarizes Superman stories from Superman #155, World's Finest Comics #114, Action Comics #266, Action Comics #263-264, and Superboy #88.
• - Inside back cover.
• Build "Big Frankie" - Back cover.