Holds up surprisingly well considering the time it was written. A worthwhile and enjoyable book for people interested Zen. That said, let it be known that the book places large emphasis on the Dao as a cosmological foundation for Zen, and the treatment of actual Zen practice, Soto vs Rinzai schools of thought, etc, comes late. Traditions like the Vietnamese and Korean are absent. I would posit this as a good "absolute beginner" introduction before reading some other popular books for more information on practice and schools of thought.