Sherlock Holmes: The Unauthorized Biography

Sherlock Holmes: The Unauthorized Biography is a Sherlock Holmes pastiche novel by Nick Rennison, originally published in 2005.

In the novel, Rennison postulates that Sherlock Holmes was involved in various historical events, including the Jack the Ripper case, the Crippen murder case, and World War I.

So, really, the book is three strands woven together. There's the material from the Conan Doyle stories, there's the real history of the 19th century, and if those two failed to provide something then I was in a position where I could simply make it up.

Rennison has stated that the novel was initially the idea of his editor, Angus MacKinnon.