This is the classic in-depth text reference in meditation. By presenting the key meditation concepts clearly Dr. Ray enables readers to guide into the big picture of meditation. Written in clear and concise language, and beautifully illustrated, the book is enjoyable to read, and it provides a clear sense of the excitement of meditation in the light of modern science. As this book progresses though, it offers many more meditation techniques, and insights that will be useful even to those who have meditated for a long time.