The Roman Hat Mystery: A Problem in Deduction
1929

The Roman Hat Mystery: A Problem in Deduction, published in 1929 by Ellery Queen, is a detective novel featuring a closed-circle murder set in a Broadway theatre. Inspector Richard Queen and his son Ellery investigate the poisoning of a lawyer during a performance, where a missing top hat becomes a key clue. The narrative combines elements of deduction, character sketches, and a detailed map of the theatre, showcasing the father-son duo's complementary investigative skills in a richly depicted 1920s setting.














