Duo Tech Book
EFFECT: The most impossible looking card trick you will ever perform! The spectator shuffles his own deck of cards and selects one (no force). He opens the prediction and it matches his card! The prediction has been on the table the entire time and never touched by the magician! Everything can be immediately examined!
This book begins with the original version of Duotech as performed by Bob Strickland for over 30 years. This is the time tested performance that Bob used to fool some of the best magicians in both England and the United States. You will also learn how to construct your own Duotech II, along with many variations devised after the release of these products!"