The Dain Curse
Everything about the Leggett diamond heist indicated to the Continental Op that it was an inside job. From the stray diamond found in the yard to the eyewitness accounts of a "strange man" casing the house, everything was just too pat. Gabrielle Dain-Leggett has enough secrets to fill a closet, and when she disappears shortly after the robbery, she becomes the Op's prime suspect. But her father, Edgar Leggett, keeps some strange company himself and has a dark side the moon would envy. Before he can solve the riddle of the diamond theft, the Continental Op must first solve the mystery of this strange family.
Dashiell Hammett

Samuel Dashiell Hammett was an American author of hardboiled detective novels and short stories. Among the enduring characters he created are Sam Spade ("The Maltese Falcon"), Nick and Nora Charles ("The Thin Man"), and the Continental Op ("Red Harvest" and "The Dain Curse"). In addition to the significant influence his novels and stories had on film, Hammett "is now widely regarded as one of the finest mystery writers of all time" and was called, in his obituary in the New York Times, "the dean of the... 'hard-boiled' school of detective fiction."