The Mastermind Wallet - Mind Reading Is Now Possible... This is an everyday wallet that can be used to amaze your spectators with real mind reading. Have a spectator write a thought inside the wallet, close it, and then seal it with rubber-bands. You then take the wallet and immediately place it into your pocket. At this point you already know what your spectator is thinking! This effect is for all skill levels in magic with astonishing results. History In Magic: The secret of this effect can be credited to the Mind Readers Billet Reader (this original prop can be seen in the demo). Nelson Enterprises sold this billet reader effect in the 1950's/1960's. Years later Tenyo released a similar category effect called Mind Scanner. Since then others have put out versions using the same secret. Rob Stiff of Magic Makers has innovated the technology in the design of this effect bringing your performances to the next level.