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.
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, Julius Schwartz (The Time Traveller), Fred Shroyer, Brackish Wells, Donald Wollheim (The Phantagraph) and T. Bruce Yerke..
Covers were by Hannes Bok, Ray Bradbury, Ray Harryhausen and Jim Mooney.
Letters published were from Issac Asimov, John V. Baltadonis, Robert Bloch, Jack Chapman Miske (Scienti-Snaps), Amelia Reynolds Long, Robert Madle, Catherine Moore, Elmer Perdue, and Jack Speer.