Hmmm ... I think value is an individual thing. Depends a lot on your expectations. I love books, saw many positive reviews, and I didn't see many others on the subject so I bought it. Learned quite a bit from it and probably will learn more as I reread multiple times. I'm not sorry I bought it. I've paid a lot more for books in the past. There are only 105 pages so if you think like a librarian and weigh value by number of pages you might not go for it.