Spacewarp was a science fiction fanzine by Art Rapp (1924-2005).
Art Rapp published his fanzine in Saginaw, Michigan from April 1947 til September 1950. Rapp was a member of the Michigan Science Fantasy Society. After a meeting of the group in November of 1949, two members set off a bomb in the front yard of Rapp's home. Police were called and neighbours gathered, and according to Rapp in an open letter he wrote of the incident, the bomb was heard from two miles away. Immediately after, Rapp quit MSFS but didn't end his zine till the next year, when he left the U.S. for military duty in Korea. He then turned the zine over to F. Towner Laney and Charles Burbee to edit. They put out two issues, the last, in 1950, called the "Insurgent Issue".
In 1983, Rapp resumed publishing Spacewarp as a member of the Spectator Amateur Press Society (SAPS).
Certain columns in Spacewarp, such as Redd Bogg's "File 13" became famous in SF fandom over time. As well, it included art and cartoons by Ray Nelson, writer of the short story, 8 o'clock in the Morning, which was later made into the film They Live by John Carpenter.
Contributors included Henry Andrew Ackerman, Michael De Angelis, Warren Baldwin, Redd Boggs (Sky Hook), W.E. Bullard, Charles Burbee, Lyon de Coeur, Wilkie Conner, Ed Cox (The Chigger Patch of Fandom), Jim Craig, Charles Hames, William James, Joe Kennedy (Vampire), F. Towner Laney (The Acolyte), Carl Lawrence, Don McConnell, Ray Nelson, Rog Phillips, Rick Sneary, Genevieve K. Stephens (Loki), Charles Stuart, Bob Tucker (Le Zombie), Bill Venable, and T. E. Watkins.