Cliff Green was Vernon's first magician friend, when they were teenagers in Canada. He was a professional magician who made his living with cards.
The books is still ahead of its time in many areas, filled with subtleties, many of which have been overlooked. E.g, his ideas on getting ready for the double-lift, many of his ideas on palming. This book had the first publication of Henry Christ's Fabulous Aces routine.
It's also a beautifully produced book that is a job to own, with among other things, wonderful full-page photos of friends like Vernon, Cardini, Malini, etc.
One of the great card books of all time, and unusual in that most of the tricks are for parlor and stage, not close-up.