Cards on the Table by Agatha Christie

A mysterious host gathers four detectives and four known murderers for an evening of bridge—only for the host to be found dead during the game. With all suspects seated at the same table, Poirot must rely not on physical clues but on psychology and deduction to find the killer. Each suspect hides a deadly past, and the motive lies in the subtle details of their behavior. The plot is intimate and cerebral, with high stakes masked by polite conversation. A unique and tightly plotted puzzle.