Correct, that is how they work, but not my reasoning for including those books. See: http://news.ycombinator.com/item?id=4997734 http://news.ycombinator.com/it

Correct, that is how they work, but not my reasoning for including those books. See: http://news.ycombinator.com/item?id=4997734 http://news.ycombinator.com/item?id=4997734 http://news.ycombinator.com/item?id=5008406 http://news.ycombinator.com/item?id=5008406