He goes into quite a bit of detail here: http://sivers.org/book

Yep ^ that's the link.

Those books are default sorted in order with my top recommendations at the top. A little blurb on each, then detailed notes inside.

If you haven't yet read Steven Pinker's book The Better Angels of our Nature, I can't recommend it highly enough. It's a long read, but the writing is crisp and often hilarious, and I challenge anyone to come away from it without a sizable dent in their worldview.