"The Moonstone" is a detective novel written by Wilkie Collins, first published in 1868. It is often considered one of the first mystery novels in English literature. The story revolves around a valuable diamond, the Moonstone, which is stolen during a birthday celebration. The narrative unfolds through multiple perspectives, revealing the characters' secrets and motives. The plot follows Franklin Blake, the heir to the diamond, as he seeks to recover it. Various characters, including Rachel Verinder, the diamond's original owner, and Sergeant Cuff, a detective, contribute to the investigation. The novel explores themes of class, race, and the nature of truth.