Guy Hollingworth - Quartet book

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Guy Hollingworth's Quartet gimmick is an incredibly versatile fake card, with many possible uses. It can be used to simplify existing effects already in your repertoire, supply unexpected endings to routines and provide entirely
It not only makes possible brand-new routines, but can also be used to simplify the workings or add unexpected endings to tricks already in your repertoire. The included 36-page booklet contains ten routines using the card (some of which are practically self-working) including:

Twisting the Aces

Dr. Daley's Last Trick

Assembly

Transposition

Reset

Waving the Aces

and more