Though remembered for the fictional stories of Sherlock Holmes, Arthur Conan Doyle himself was involved in dozens of real life criminal cases—solving many—and zealously campaigned for justice in all of them. Also a physician and journalist, Doyle was instrumental in defending an Anglo-Indian solicitor accused of brutal attacks on livestock and in freeing a man wrongly sentenced for murder. With 8 pages of photos, Christopher Sandford's history examines Doyle's career as a crusader, and explores how these cases may have influenced his beloved detective tales.