This is an impressive pocket resource for Buddhism. Unlike some earlier reviewers, I did read it from cover to cover, and am very impressed. Powers' explanations of basic Buddhist concepts is very clear and straightforward. Of course in a work like this he had to be selective, but the range of entries is staggering, with good choices of what to include as most representative/interesting. He covers all the main Buddhist traditions, including modern western Buddhist movements. My only complaints are that he puts disproportionate stress on the twentieth century and on Tibetan Buddhism. His coverage of southeast Asia and Sri Lanka is very light. But it's definitely a VERY good reference work for anyone interested in Buddhism.
Michael McCormack, Your review of this book shows your ignorance. You state the author needs more research yet you admit you did not even read the entire book! This review shows you are both stupid and lazy. I found it had impressive coverage for a book this size. You should stick to watching those Buffy The Vampire Slayer reruns You love so much. That is obviously your intellectual level!