Zens, M.F.: The Zens Quadruple Poker Trick And An Idea ©1931 M.F. Zens, Kenosha, WS Softcover, saddle-stitched, 5.5x8.5", 17 pages

Image courtesy eBay seller JayAndLefty

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Contents (from book pages, numbers are not page numbers):

1 Just a Few Words
2 The Quadruple Poker Trick: remove any poker hand from pocket, and more
3 The Idea: with marked cards