""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 the murder. The story unfolds through multiple perspectives, intertwining elements of suspense, romance, and intricate plotting. As the investigation progresses, secrets are revealed, alibis are tested, and unexpected twists emerge, keeping readers engaged in the suspenseful unraveling of the case. ""The Leavenworth Case"" is known for its well-crafted mystery, intriguing characters, and atmospheric setting. It showcases the traditional elements of detective fiction, incorporating elements of puzzle-solving and suspense to captivate readers as they try to unravel the truth behind the Leavenworth murder.