Satan's Scalpel

'Satan's Scapel' is a horror novel by Arthur Leo Zagat. Would Dan King, the main character, ever find the hidden lair of the beastmaster, who nightly sent his hairy hordes to maim and kill? How could he possibly locate that den of ghastly horrors in time to save his beloved from becoming the fiend's willing plaything—a creature half ape, half woman?