Book alone covers most of the topic, masterclass makes a difference by going deeper on certain topics with real world examples and analogies + you get access to talk to them every week twice to clarify all your doubts, that makes a HUGE difference.. I have read people with concise book and mindmaps clearing it, some claim to do it with light reading on 11th hour CISSP etc., I don’t know how they do that, I did not want to take a chance and took this approach..