The stunning new novel from the New York Times bestselling author of The Age of Odin, in which the worlds of Arthur Conan Doyle and H.P. Lovecraft collide.

James Lovegrove is the New York Times bestselling author of The Age of Odin. He has been short-listed for many awards including the Arthur C. Clarke Award, the John W. Campbell Memorial Award, and the Scribe Award. He won the Seiun Award for Best Foreign Language Short Story in 2011, and the Dragon Award in 2020 for Firefly: The Ghost Machine. He has written many acclaimed Sherlock Holmes novels, including Sherlock Holmes & the Christmas Demon. As well as writing books, he also reviews fiction for the Financial Times. He lives in Eastbourne in the UK.