I use Google. https://www.google.com/&q=ask+hn+books+site:news.ycombinator.com https://www.google.com/&q=ask+hn+books+site:news.ycombin... This question gets

I use Google. https://www.google.com/&q=ask+hn+books+site:news.ycombinator.com https://www.google.com/&q=ask+hn+books+site:news.ycombin... This question gets asked every couple months on HN, so check out the previous threads. Also, the above search will give you some good book recommendations on a variety of topics. That would be my starting point. (Actually it wouldn't, I'm more into military history books, but...)