The Magazine of Fantasy & Science Fiction (later Fantasy & Science Fiction and usually referred to as just F&SF) is a digest-size American fantasy and science fiction magazine first published in 1949 by Mystery House and then by Fantasy House. Both were subsidiaries of Lawrence Spivak's Mercury Publications, which took over as publisher in 1958. Spilogale, Inc. has published the magazine since 2001. Since the April/May 2009 issue, it is published bimonthly with 256 pages per issue.