The Poisoned Chocolates Case (1929) is a detective novel by Anthony Berkeley set in 1920s London and featuring his detectives Roger Sheringham and Ambrose Chitterwick. Six armchair detectives meet to discuss a murder that has baffled the police, each suggesting their own individual solutions. The novel is an elaborated version of the 1929 long short story "The Avenging Chance", which has been considered the author's masterpiece. In the short story, Sheringham solves the case, but in the novel that solution is not accepted as the correct one.