Houdini, an escape artist and illusionist, became interested later in his life in debunking spiritualists, disbelieving anyone who claimed to have supernatural powers. This was during an era where paranormal phenomena, especially seances, were extremely popular. Although skeptical of their claims, he longed to find a credible source to communicate with family members he had lost. This book chronicles his travels and the many people he spoke with and his observations of their 'powers' and along the way also reveals many of the tricks they employed to deceive their paying customers.