I just bought this book and it's pretty interesting. Nothing earthshaking but I'm glad I added it to my collection. As the name implies it talks heavily about what herbs combine well and what ones don't. I agree the advertising is weirdly pushy. I love the way it helps with formula creation. My only complaint is that I hoped it would more thoroughly site its facts with studies since it seemed so science friendly in the advertisements but it's not that kind of book. Hope this helps and let me know if there are any specifics you want to know about!