I had high hopes when I got this book, but as I read through it I became increasingly disappointed. It has a few merits, but many more flaws. They include:
1) It is terribly organized. A quick glance at the table of contents reveals that the text is composed of 102 chapters. Simple division reveals that the average chapter length is about four and a half pages. That alone is odd. But consider the subjects of some of the chapters that are side by side: for some reason the author thought it was appropriate to put a 3 page chapter about the physiology of breathing (chapter 20, "Breathing In; Breathing Out") right before a 3.5 page chapter about the enigmatic Zen riddles known as Koans (chapter 21, "A Quest for 'No' Answers"). The quotes leading into each chapter demonstrate how sudden and unpleasant of a jolt this is. Chapter 21 opens with the quote "Thoracic respiration gradually shifts to the abdominal and turns into a predominance of the abdominal respiration with the progress of the meditation" (58). (Why is that even significant enough to merit a special, partitioned quote?) And then, 3 pages later, we have the opening quote, "Koan study is essentially a skillful means to really make us question what this life is, until we fully resolve the question" (61). This is a nice quote, but hard to take in right after reading about opioid pathways and abdominal muscles. I understand that this book attempts to fuse two subjects that are difficult to reconcile--namely technical neuroscience with a highly abstract, religious idea system--but crunching together breathing mechanics and zen koans in the span of 7 pages, without either section referring to the other, is not the way to do it. Austin would benefit from reading "On the Origin of Stories" by Brian Boyd, which is a masterful synthesis of evolutionary theory, brain science, and fiction. It shows that disparate subjects can be combined in a user friendly fashion.
2) Zen Brain Reflections is not particularly thoughtful, philosophical, or insightful. Take chapter 65, a 2.5 chapter about mirror neurons and empathy (directly preceded by a pointless, 2 page chapter about spiritual teachers who commit sexual transgressions). In said chapter, which is emblematic of much of the book, Austin says "The few examples cited in this chapter and elsewhere barely introduce the range of topics that might arise with relation to the 'empathies' and 'theories of mind.' Worth noting in any book about Zen, however..." (269). Hold on! Such core human characteristics as empathy and theory of mind are not worth examining? ANY book about the brain and human experience should take at least a few pages to summarize these concepts, as they are FUNDAMENTAL to how we experience the world. A book about Zen and the brain, no less, should fully flesh out these concepts because they strongly relate to aspects of Zen. For example, consider that Zen is about mindfulness. Next consider the fact that we humans are ultra social creatures who constantly use our theory of mind to think about social dynamics--about what others think of us, what they think that we think, what they will think if we do x, y, or z, and so on. Anyone who has tried mindfulness will be surprised by the constant swarm of frantic thoughts regarding other people's minds that dominates consciousness. The "monkey mind" that Zen seeks to tame is fueled largely by our theory of mind imperative, and thus we would do well to understand theory of mind, such that we can appropriately deal with it in pursuit of Zen ideals. Is this too philosophical of me? I don't think so. Austin, in contrast, focuses almost exlusively on the interface between neural structures and Zen. Theory of mind is too complex to be neurally pinpointed, and so Austin essentially ignores it. There are other concepts as well that Austin disappointingly shuns in favor of neurotransmitters and other technical details, which gives the book a lackluster feel indeed.
If you are able to read page upon page of extremely dense, technical jargon about neuroscience, then this book is for you. If not, you will probably be better off reading about Zen and the brain separately, so you can connect the dots for yourself.