This is an excellent little book. It is based on the a series of talks that were given by Shunryu Suzuki in a sesshin lead by him, as it happened near the end of his life. The book in my view would be suited to a more advanced practitioner rather than a beginner. However all would benefit by reading it. The book gives a line by line explanation of the "The Identity of Absolute and Relative" sutra. This sutra along with the "Heart Sutra" are the two main sutras chanted in Zen Buddhist services. As practitioners we hear this sutra over and over again and it is easy to think of it as just a simple and poetic piece(even dare I say it, tune out to some extent with our own familarity), which it is. Suzuki's explanation of the sutra shows that considerably more can be gleaned from studying/meditating on this important zen work.