The Exploits of Sherlock Holmes is a short story collection of twelve Sherlock Holmes pastiches, first published in 1954. It was written by Adrian Conan Doyle, who was the son of Sir Arthur Conan Doyle (the creator of Sherlock Holmes), and by John Dickson Carr, who was the authorised biographer of the elder Conan Doyle. The first six stories were written in collaboration by the two writers, while the last six stories were written solely by Adrian Conan Doyle.Each story in this collection is postscripted with a quote from one of the original Sherlock Holmes stories, making reference to an undocumented Holmes case that inspired it. Source: Wikipedia (en)