I should have been a neuroscientist. I love this stuff so much! Linden does a great job here of explaining without either oversimplifying or obfuscating. I learned a lot about the pleasure circuitry of the brain. Perhaps my favorite bit was near the end, where Linden takes on Kurzweil's singularity as it relates to the brain. I wish there was more on exercise, of course, but it's not Linden's fault that the measuring is so damnably fuzzy that it's difficult to come up with data. This book made my dopamine levels fluctuate madly. I recommend it.