Harry Lorayne was an American mnemonist, magician, and author. He was well known for his incredible memory demonstrations and appeared on numerous television shows. His card magic, especially his innovations in card sleights, is widely emulated by amateur and professional magicians.
Uses programmed learning techniques for the most common mind/ mental problems, eg, memory, problem solving, concentration & observation, worry and anxiety. If you're not familiar with PL, a short, one or two sentence lesson is given, for you to recall, with key words missing. Works, but is a difficult book to skim through or summarise.