"The Somnambulist and the Detective; The Murderer and the Fortune Teller" by Allan Pinkerton Allan J. Pinkerton was a Scottish-American detective and spy, best known for creating the Pinkerton National Detective Agency. In this book, he describes one of his cases. When a murder occurs and a psychic ends up in the mix, Pinkerton's investigation becomes anything but ordinary. Finding the culprit will take more than a crystal ball.