Wilkie Collins 
The Moonstone 

The Moonstone is a 19th-century novel by the master of sensation fiction, Wilkie Collins. It is considered, with The Woman in White, to be his best work, and is also commonly seen as the first English detective novel. Many of the standard ground rules for detective fiction can be found in this work, as well as examples of Collins‘ forward-thinking approach to the treatment of Indians and servants.