Christopher Morley (1890–1957) was an American novelist, essayist, journalist, and poet. He began his literary career at Oxford University as an editor of The Haverfordian and published his first novel, Parnassus on Wheels, in 1917. Its sequel, The Haunted Bookshop (1919), is one of the most beloved mystery novels ever written. Morley also edited the Saturday Review and cofounded the Baker Street Irregulars, a literary society dedicated to the study of Arthur Conan Doyle’s Sherlock Holmes stories.