Best known as the author of Sherlock Holmes stories but also a devout spiritualist, was entirely convinced by a set of photographs apparently showing two young girls from Cottingley in Yorkshire playing with a group of tiny, translucent fairies. To demonstrate his unshakeable belief in the spirit world, he published The Coming of the Fairies in 1922. Doyle's book lays out the story of the photographs, their supposed provenance, and the implications of their existence. This quirky and fascinating book allows us to get inside the mind of an intelligent, highly respected man who happened to believe in fairies. The Cottingley Fairies appear in a series of five photographs taken by Elsie Wright and Frances Griffiths, two young cousins who lived in Cottingley, near Bradford in England. In 1917, when the first two photographs were taken, Elsie was 16 years old and Frances was 9. The pictures came to the attention of writer Sir Arthur Conan Doyle, who used them to illustrate an article on fairies he had been commissioned to write.