At one time or another, most people have experienced a creepy, spine-tingling sensation they can't explain. Science may rationalize these fears, blaming a natural fear of the unknown, an open window or a drafty doorway, but millions of people believe there is much more to it than that – and who can say they are wrong? Glamis Castle in Scotland, made famous by Shakespeare's Macbeth is said to be haunted by a whole host of ghostly residents. Dracula's castle in Transylvania, another spooky literary hub, is perhaps one of the most nerve-wracking places on earth. Ghosts traces the cultural and literary origins of the paranormal, uncovers the dark secrets beneath the myths and untangles the enigma of the supernatural.