It's a great book, summarizing all the studies and discoveries around brain health and the link with body biochemistry and exercise over the past 50 years. Not the typical common wisdom of "exercise is good for you", but a more serious and deep analysis of why it is good, and what exactly it does to your brain, at a biochemical level.
As a person that always knew how much exercise is important for the body - but always hated exercising - this book gave a reason to pause and re-think my priorities.
If you care about your brain, read at least the sample chapters and see if you like it.
[1] http://www.amazon.com/Spark-Revolutionary-Science-Exercise-B...