The Magazine of Fantasy & Science Fiction Mystery Magazine" appeared, edited by Fred Dannay and focusing on detective fiction. The magazine was published in digest format, rather than pulp, and printed a mixture of classic stories and fresh material. Dannay attempted to avoid the sensationalist fiction appearing in the pulps, and soon made the magazine a success. In the early 1940s Anthony Boucher, a successful writer of fantasy and sf and also of mystery stories, got to know Dannay through his work on the Ellery Queen radio show. Boucher also knew J. Francis McComas, an editor who shared his interest in fantasy and sf. By 1944 McComas
Pen name A. Heinlein wrote stories under pseudonyms of Anson MacDonald (a combination of his middle name and his then-wife's maiden name) and Caleb Strong so that more of his works could be published in a single magazine. Stephen King published four novels under the name Richard Bachman because publishers didn't feel the public would buy more than one novel per year from a single author. Eventually, after critics found a large number of style similarities, publishers revealed Bachman's true identity. Sometimes a pen name is used because an author believes that their name does not suit the genre he or she