Coded Card Prediction by Ken de Courcy - TrickWild-Colombini Magic
A novel piece of magic which will bring about the neatest 'number force' that you ever saw! A 'code book' is placed on the table then a spectator is asked if he'd like to co-operate by selecting a FREE thought-of number. At the end of simple calculation he gets another number. This number is used to arrive at a card taken from the 'code book.' Inside an envelope the spectator finds the same card! Complete with 'code book' (laminated folder). Use any deck. It comes with an additional routine by Aldo Colombini.