I just finished this book, and it's excellent. Aitken definitely has a gift for explaining things in a clear manner. I agreed with this Amazon review:
This is a Zen book for the beginning Zen practitioner, by which I mean someone who has already decided to try zazen meditation practice and may have been practicing for a few weeks or months. . . . [A]s one who had finally tired of reading cookbooks and hungered for the meal, this book pointed me in the right direction (or, at least, ONE right direction) and helps me actually "cook," so to speak.
I also found this quote from the section on Zen and Ethics very interesting:
Perfection of character comes with the realization of a pure mind, but as Hui-neng said, with an ordinary thought you are (again) an ordinary person. Practice in daily life is the same as practice on your cushions: check your ordinary thoughts of greed, hatred, and ignorance and return to your original, pure mind. Like Zen study generally, character change is a lifetime work. And to return to Yamada Roshi's words, Zen study is character change.