The Murderers — Fredric Brown

Lust plus greed equals murder in this classic Hollywood noir novel by “a real pro” (The New York Times Book Review).
 
A struggling actor, Willy Griff keeps himself entertained with the wife of a business mogul, but he wants more: He also wants the business mogul's money. The mistress, Doris, likes the idea even more than Willy does, and figures if she helps plan the murder, she can ditch the husband and keep the cash.
 
It's a dangerous scheme for two low-level, aspiring criminals. But Willy comes up with an ingenious, foolproof plot for pulling it off. At least, he better hope it's foolproof . . .
 
The Murderers is a gritty tale of crime and passion from Fredric Brown, a master of noir and mystery and winner of the prestigious Edgar Award.