Warren and his wife Beverly moved to
Los Angeles in 1966. As an assistant to science fiction agent, editor, and collector
Forrest J Ackerman, Warren came into contact with major filmmakers-in-waiting, also inspired by Ackerman; he went on to develop personal friendships with several of them. He and Beverly became very active in the
Los Angeles Science Fantasy Society, as well as being involved in many of the Los Angeles-centric science fiction conventions held through the 1980s. He and friend Allan Rothstein were on the convention committee of L.A. Con II, the
42nd World Science Fiction Convention (
Worldcon). Taking advantage of their knowledge of who was attending and the convention's programming schedule, they wrote the murder mystery,
Fandom is a Way of Death, set at the convention. Everyone named in the story, except the detective Johnny Atlantis,
were real people, including all the victims and the murderer. This was sold separately as a convention publication, with the solution placed in an envelope with every copy. On the last day of L.A. Con II, the murderer was revealed and took a bow. Warren's 1968
short story "Death Is a Lonely Place" appeared in the first issue of the magazine
Worlds of Fantasy. During this period, he also wrote stories for
Warren Publishing's oversize black-and-white comic books
Creepy,
Eerie, and
Vampirella. ==Books==