Just before Christmas 1908, Marion Gilchrist, a wealthy 82-year-old spinster, was found bludgeoned to death in her Glasgow home. A valuable diamond brooch was missing, and police soon fastened on a suspect - Oscar Slater, a Jewish immigrant who was rumoured to have a disreputable character. Slater had an alibi, but was nonetheless convicted and sentenced to death, later commuted to life imprisonment in the notorious Peterhead Prison. Seventeen years later, a convict called William Gordon was released from Peterhead. Concealed in a false tooth was a message, addressed to the only man Slater thought could help him - Arthur Conan Doyle. Always a champion of the downtrodden, Conan Doyle turned his formidable talents to freeing Slater, deploying a forensic mind worthy of Sherlock Holmes. Drawing from original sources including Oscar Slater's prison letters, this is Margalit Fox's vivid and compelling account of one of the greatest miscarriages of justice in Scottish history.

Like a good murder mystery, Conan Doyle for the Defence is a fast-paced read that twists and turns with the panache of a Holmes short story. -- Paula Byrne * The Times *
This is a first-class book: pacy, insightful and lucid -- James McConnachie * The Sunday Times *
lucid and engaging -- Allan Massie * Scotsman *
True-crime writing at its finest... a real page-turner... definitely a must for fans of Sherlock Holmes * Belfast Telegraph *

Margalit Fox is an award-winning senior writer at The New York Times. Her previous book, The Riddle of the Labyrinth (Profile, 2013), about the decipherment of the mysterious Bronze Age script Linear B, received the 2014 William Saroyan Prize for Nonfiction. Find her on Twitter @margalitfox