Committing the history of Zen Buddhism into book form is no mean task. Dumoulin's treatment treads the line between fact-book and editorial, between a history book and a philosophy book, and he walks that line with grace. He admits in this book that it is impossible to give a true history of Zen without some treatment of its philosophical and religious contexts, and indeed he delves quite well into many of the origins and 'tenets' of Zen throughout the past. However, he does well to avoid over-moralizing or allowing his work to become a philosophical discourse, and instead keeps the historical pace quick and driven, pausing only to give longer treatment to particularly salient topics (e.g. the Sixth Patriarch). All in all, not a book for the disinterested observer -- rather, a book for those who wish to dive into the past and start swimming with vigor.