While most readers are very familiar with Mark Twain's adventures, books and humor, many don't realize that the author had a deep interest in mysterious happenings. Throughout his life, he made a career out of debunking pomposity and arrogance. He was willing to accept things that were "outside the norm", including telepathy, ghosts, prophetic dreams and more. He even became one of the most famous members of the widely acclaimed Society for Psychical Research.