If you have ever seen Earl Ray perform this routine as part of his fabulous stage act, you know just how strong it is. If you haven't seen Earl's act, let me describe the Interlock. It's a move where you clasp your hands together by interlocking your fingers. Your hands are turned showing the palms empty. They are turned again to show the backs. When they are turned outwards again, a card is seen nestled in your palms. The card is dropped to the ground and the moves repeated until several cards are produced. Earl has used this in his act forever. So, he knows all the ins and outs. Earl teaches you the entire routine, aided by a ton of photos. After teaching the production with cards, he shows you a method using coins. The book is 36 pages; softbound.