Magic Tricks and Intellectual Property

Absolutely incorrect. One cannot receive, what would in effect be, a patent for an idea expressed in a book. If I were to come up with a new accounting procedure and published that procedure in a book, the copyright on the book in no way whatsoever extends to me any protection of that procedure. In fact, the courts have explicitly ruled on this scenario and found as such.*

Moreover, from What Does Copyright Protect? (FAQ) | U.S. Copyright Office

*I’m in class right now so I can’t cite the case at the moment, but I will be happy to do so when I return home.