The Kill-Off by Jim Thompson

Luane Devore's days are numbered. All her neighbors in the declining seaside resort town of Manduwoc want her dead. Some, like her young husband Ralph and his girlfriend Danny, want the thousands of dollars she keeps hidden under the mattress she spends her days resting on. Others want her to stop her malicious gossip--some of which could ruin lives.

Told from multiple perspectives, The Kill-Off tells the story of a woman not long for this earth--but who will finally take matters into their own hands, and when? THE KILL-OFF was the basis of Maggie Greenwald's critically acclaimed film of the same name.