Mozart's Brain and the Fighter Pilot: Unleashing Your Brain's Potential. By Richard Restak

This is a book written back in 2001; so it is not what I would call state-of-the-art. Nonetheless, it contains twenty-eight recommendations to better capitalize on your brain cognitive performance; and these are recommendations that remain valid and therefore useful. It is also a good general review about how the brain works and related functionality.
It is written in such a way (one chapter per recommendation) that reading is light and enjoyable. Each recommendation conveys sound and well-founded advice. Some are more credible than others; but hey, at one point, you need to shut down your left brain and let the right brain manifest itself.
If you are in your first approaches to study more on how our brains work, this is a good place to start.
In particular, I would recommend this book to engineers and executives (left-brain thinkers) that are curious about how to get their brains to work better.