How to build a brain – An introduction to neurophysiology for engineers
The thing with brains is that even if you understand all the building blocks, that really doesn't tell you much about how the brain actually works. Trying to understand the brain from neurons is like trying to understand Microsoft Word by looking at its machine code. Of course the brain has the added complexity that it isn't designed by humans, and so it's difficult to pinpoint where one region ends and another begins.