Satan in Malibu came from Vega Books via the brain and typewriter of Frank Cannon, and it deals with a man who tries to solve his brother's murder. He learns of the death when a telegram arrives, but is the woman who sent it to him really trying to help, or is there more to her story? The hero's investigation takes him to Santa Cruz Island off the coast of Southern California, and when he gets there he runs across a band of satanists who may have done the killing.

We last ran across Frank Cannon when we shared a cover for his 1964 effort Hide in Hell. The hell in that book was figurative. The hell in Satan in Malibu is a slightly less so, since the villains actually believe in it, but the reason for the murder is rooted firmly in the mundane world. We don't know who painted the cover art, but for Vega Books it's not bad. The copyright on this is 1961. 

Above, a Vega Books front for Frank Cannon’s Hide in Hell, with art of a fugitive and his female companion, who’s probably wondering why they can’t hide in the Bahamas or Bali. Cannon, by the way, also wrote Satan in Malibu, so apparently even the Prince of Darkness didn’t like spending time in Hell. 1964 on this, with uncredited art (but it's Bill Edwards).