This is a wonderful book. I cherish it like treasure. If you are doing research in Buddhist meditation then this book is a must. Both theory and practice of TWIM MEDITATION of Bhante Vimalaramsi is clearly explained in this book. It is a valuable assets for all TWIM meditators. I have read a number of books on meditation but this book is an outstanding book on meditation. A must have book for all spiritual seekers and especially Buddhist meditation people. A must read book. Only 5 stars there but if there 1000 stars then I would have given 1000 out of 1000.