As his reputation grew, Houdini assumed a leadership role among other magicians. He served as president of the Society of American Magicians and founded the Magician’s Club in London. Houdini was generous with other magicians, but jealous of anyone who attempted to duplicate his escapes. He wrote books and magazine articles that revealed some of magic’s simpler tricks, but carefully guarded his own secrets. Though known to be friendly and warm, Houdini had a large ego, could be touchy and petty at times, and frequently displayed a volatile tempter to his assistants.