Sherlock Holmes of Baker Street: A Life of the World's First Consulting Detective is a 1962 novel by William S. Baring-Gould.

[5] Other details established by Baring-Gould, such as Professor Moriarty being Holmes' childhood mathematics tutor,[6] that Holmes was once an actor,[7] and the continuing affair and one-night stand with Irene Adler, leading up to the birth of a son (who is implied in the book to be Nero Wolfe),[8] have continued to be a part of the Great Game and have been used in other Sherlockian pastiches.

[6] The book also offers one of the earliest versions of Sherlock Holmes meeting Jack the Ripper.

[9] Five years later in 1967, Baring-Gould would go on to publish The Annotated Sherlock Holmes, which would also be considered definitive,[10][11] at least until Leslie S. Klinger published The New Annotated Sherlock Holmes in 2004–2005.

[12][13] Baring-Gould used many biographical details that he invented in Sherlock Holmes of Baker Street for his two annotated volumes.