Collector’s Workshop Chronology: Strong Mental effect

A spectator is asked to h ink of any date.  The magician then hands him a datebook. The datebook contains a different card written for each day. the spectator goes to that date and there is a card name written there.  The magician ask the spectator to find and remove an envelope from the datebook. there is only one envelope. A card is removed.  It matches the card written on the date.  Very strong magic and although seeming impossible it is easy to do..With instructions. Excellent condition.