This ASTONISHING Self-Working CARD TRICK Is RARER Than DIAMONDS!

"Thingumbob of Diamonds": (from Werner Miller's e-book “Enigmaths 2”, https://www.lybrary.com/enigmaths-2-p-33511.html)
Werner Miller is a retired math teacher living in Austria. He has created hundreds of math-based magic tricks which you can study in his more than 50 ebooks. He publishes his material in English and German. He has written for many magic magazines and continues to create and write new material.

The following sampler gives you a little taste of what he has to offer. If you like tricks that do not require sleight-of-hand, tricks that are based on math, logic, and geometry, then you will certainly enjoy this ebook and the many other ones Werner has written: https://www.lybrary.com/sampler-werner-miller-p-845994.html