More of my favorite eggheaded Belgian detective! Love the setup for this one. Hercule Poirot's old friend, mystery novelist Ariadne Oliver, is coordinating a murder mystery party at an estate. She suspects she is being manipulated to set up the mystery for a real murder, and calls in her pal Poirot to thwart the killer.
This is classic Christie at her best--twists and turns, and just when you think you know who the killer is, she throws you another curve ball. All is resolved by the satisfying ending. Give it a read.