""The Leavenworth Case"" is a classic mystery novel written by Anna Katherine Green and was first published in 1878. It is considered one of the earliest detective novels in American literature. The story revolves around the murder of wealthy businessman Horatio Leavenworth and the subsequent investigation into the crime. The novel follows the efforts of Detective Ebenezer Gryce as he delves into the complex web of clues, suspects, and motives surrounding...