Imagination!, subtitled The Fanmag of the Future With a Future! was a science fiction fanzine published by the Los Angeles Science Fiction Society in the 1930s and edited by Forrest J Ackerman.
Imagination! was first published in Los Angeles, California, U.S.A. in October 1937. Thirteen issues were released, and it ceased publication in October 1938.
Imagination! #4, the January issue, is noted for being the first appearance in print of Ray Bradbury, who was 17 at the time. His story, "Hollerbochen's Dilemma", was continued in the September issue, by which point he had turned 18. Not long after he started his own fanzine, Futuria Fantasia, with $90.00 lent to him by Ackerman.
Other contributors of writing included Franklin Brady, Karel Capek, Jack Coburn, Myrtle Douglas, Litterio Farsaci (The Golden Atom), Paul Freehafer (Polaris), Erick Freyor, Allen Glasser, Russ Hodgkins, Charles D. Hornig (The Fantasy Fan), Henry Kuttner, Sam Moskowitz (Helios), Raymond Palmer (The Comet), Julius Schwartz (The Time Traveller), Fred Shroyer, Brackish Wells, Donald Wollheim (The Phantagraph) and T. Bruce Yerke (The Damn Thing).
Covers were by Hannes Bok, Ray Bradbury, Ray Harryhausen, Jim Mooney and Malcolm Smith.
Letters published were from Isaac Asimov, John V. Baltadonis (Fantasy Fiction Pictorial), Robert Bloch, Louis Kuslan (Cosmic Tales,The Miscellany) Amelia Reynolds Long, Robert Madle (Fantascience Digest), Walter Marconette (Scienti-Snaps), Jack Chapman Miske (Bizarre), C. L. (Catherine) Moore, Elmer Perdue, and Jack Speer. The letter column in Imagination! was called "Voice of the Imagination!". Upon the demise of Imagination!, it was this letter column that succeeded it, published by Forrest J. Ackerman and Myrtle Douglas as Voice of the Imagi-Nation.