What book do you need to read to learn how to "fumble") in the protection of author today?

Question

DRM

I want to be able to bypass protection on the resource, author today. I read an article that says that you can bypass the protection of books. I quote the words from the article - "The conclusion can be drawn as follows. DRM protection methods for e-books exist, and they generally work for the vast majority of ordinary users (which, in fact, is their main goal). If desired, protection can be bypassed, and this won't be overly difficult. We haven't heard of any cases of legal action for DRM removal lately."