My new book Something Deeply Hidden (out Sept 10!) has more textual variants than any known book ever published. There are a total of 1,125,899,906,842,624 versions of the book out there in the wave function of the universe. #SomethingDeeply
I used a quantum random number generator to generate a 50-digit binary number, splitting the wave function 50 times, and 2^50 = 1,125,899,906,842,624. (About one quadrillion.) The resulting number is printed in the book, separately for each branch.
The branch you are on contains version number 756,132,390,815,553. It's printed on the copyright page.
Speaking of Quantum Mechanics... There are lots of popular books out there on the subject; however, it would be nice to see very short treatments of the core principles for people with at least some technical (e.g. math) background. I think I might try to write something like that here for Quantum Computing. It's actually pretty easy to describe the basic ideas, so that one can even begin inventing ones own quantum algorithms.