This is an absolute waste of money and I'm frustrated at myself for ordering the physical copy when I should have just gotten the PDF. The book is rambling and ridiculous--Over half of the book is restating something already said earlier in the text or saying something that never needed to be said. Large swaths of the back half of the book generically describe things that you'd be better suited for finding in the rule books for the game you're actually playing--ALONG with the exact same advice regarding difficulty/variety. Almost everything in this book should/will be addressed by readying the Game Masters guide of whatever game you're playing. The DMG for D&D 5e, for instance, does a TREMENDOUSLY better idea of providing guidance for developing a campaign and adventures. This book might have been helpful in years past but it is so shallow that one could get all of this advice, and then some, in a more better writing voice for free on blogs.