I read this book slowly, over the course of several months, and although I appreciated what the authors had to say, I think I would have been better off had I read it faster. Much of what the book covers is really Parenting 101, just targeted to boys, so it wasn't all that revelatory to me personally. However, I think there are thousands--maybe millions--of parents out there who would GREATLY benefit from reading and internalizing this book, given the wretched parenting I see all too often where I work (in a public library).
What I especially like about this book is how the chapters are organized, so you can choose to read the whole thing in order, as I did, or skip to the sections most relevant your own son's stage of development or circumstances. And they included further references and resources at the end of each age-specific section. I'm reading an older edition, so some of the references are a little outdated and might be hard to find, but they probably fixed that for the newer edition.
I also especially liked the examples and stories included throughout. They helped ground and explain the theories in a very concrete, practical manner. The authors have extensive experience, especially Don, who is a marriage, family, and child counselor, and they really seem to know their stuff!