Definitely books are great tools for knowledge expansion, understanding and professional experiences.So the value you get from reading gambling books depends on your ability to leverage ideas you grabbed,apply relevant tips or insights responsibly.It takes one idea to improve your skills in strategic gaming,so it makes sense to explore books too.
Yes, I also said that, and now I want to say that no book can actually be bad for us unless we are taught something bad there. In this case, your books on terrorism or militant education will definitely be harmful for us, but if there is a book about gambling and if these topics are discussed there, then I would say that book will be good for us.
But if the books are such that we have to achieve continuous winning in that way, then I would say that it would be better than buying that book because in gambling everything depends on luck, here no one can achieve victory through any strategy skill.