I reserve a star for only one reason... their proofreader, if indeed there was a proofreader, was a crazy person. Other than that, this is a wonderful, accessible book about the history and practice of Reiki. I just got attuned to Reiki Level One this summer, and this book is really helping me figure out how to babystep my way through becoming a good practitioner.
One of the things that you need to know about Reiki if you're going to be a practitioner is the history of how it came to be, and what your personal lineage is. Because of a few hiccups around the time of the Second World War there are a lot of myths and misconceptions about Reiki practice and history. This book goes into detail about how those misunderstandings came to be and what the real truth likely is. I think the writers also have a really healthy attitude about current trends in Reiki and people who have broken with the traditional rules for good, sound reasons (for example, those masters who decided that Takata's price of 10,000 dollars for an attunement was too high).
It also lays out in simple terms how to give a treatment, which is great, and they also have good, simple meditations for people who are just starting out. The book also lays out specifics about what you should be able to expect from a good Reiki teacher at each level. I would highly recommend this book to people who are curious, or to people who are already attuned. Very good stuff.