The Zig Zag Girl (Stephens and Mephisto Mystery, Bk. 1)

Brighton, 1950. A girl is found cut into three sections, and Detective Inspector Edgar Stephens is convinced the killer is mimicking a famous magic trick--the Zig Zag Girl. The inventor of the trick, Max Mephisto, served with Edgar in a special ops group called the Magic Men that used stage illusions to confound the enemy. Max still performs, touring with ventriloquists, sword-swallowers, and dancing girls.

When Edgar asks for his help with the case, Max tells him to identify the victim, for it takes a special sidekick to do the Zig Zag Girl. Those words haunt Max when he learns the victim was a favorite former assistant of his own. And when Edgar receives a letter warning of another "trick" on the way, he realizes that it is the Magic Men themselves who are in the killer's sights.