This isn't a bad book, but it's more of a beginner's guide as the author says in the first chapters. The techniques presented in this book are super basic, and you can glean the same insights from reading books by monks (who are, arguably, better teachers of meditation than this author).

One of the main issues I have with this book specifically is that it offers some bad advice regarding form and posture. It's important that you're comfortable during meditation, but the author claims that it isn't necessary to sit up straight or endure any discomfort during a meditative experience. I would argue the opposite, because in my meditation practice, I have found that acknowledging and enduring the discomfort associated with sitting actually causes a deeper meditative state. This is a more Buddhist approach to meditation: By acknowledging, questioning, and subsequently observing the dissolution of pain, you acquire knowledge about the transitory nature of reality. In the long term, sitting with the correct posture is ultimately beneficial for your whole being. While it is not necessarily a requirement for "good" meditation, it is certainly conducive to letting go of tension and ensuring a certain state of awareness.

Other than that, the information presented in this book is pretty generic, and it can be found in a lot of other texts. The author includes some quirky attributes of transcendental meditation in his technique (ah ham), but these are certainly not required for you to become a good meditation practitioner. I would recommend books by Jack Kornfield and the Dalai Lama if you want to learn more about vipassana, as this would be the next step for someone who wants to read books about more intermediate-to-advanced meditation techniques.