“Truly wicked . . . an historical thriller on a par with The Alienist .” —Steven Katz, screenwriter of Shadow of the Vampire   It is the 1920s, and Spiritualism is all the rage. With séances taking place in parlors across the country and Harry Houdini and Sir Arthur Conan Doyle arguing metaphysics in the papers, the media embraces the feverish obsession with the paranormal. Twenty-three-year-old Harvard graduate Martin Finch is sent by Scientific American on the investigative opportunity of a lifetime: an examination of the powers of Philadelphia “society psychic” Mina Crawley. But Finch, prepared to debunk a fraud, instead finds himself falling under the spell of the beguiling Mrs. Crawley—and uncovering a truth darker than anyone could have imagined.