New run of Guru Book cancelled due to pirate copy in circulation

[Terse]

Shocking and scandalous!  

On a slightly unrelated topic, what’s a guru book?

[Terse]

Nobody has actually mentioned what this book does yet.  I did a web search and found the English-language page of the developer that does not say what the book is (though I now know it has a black and red cover) and another link to a thread on this website where a bunch of people praise the decision to make an English language version of the book (without mentioning the function of the book)

www.amazon.com has a ton of books that may be suitable for our use, if just owning a book is the end goal.