The Road to Character, David Brooks - http://www.amazon.com/gp/product/081299325X
Thing Explainer, Randall Munroe - http://www.amazon.com/gp/product/0544668251
Being Nixon: A Man Divided, Evan Thomas - http://www.amazon.com/gp/product/0812995368
Sustainable Materials With Both Eyes Open, Julian Allwood - http://www.amazon.com/gp/product/190686005X
Eradication: Ridding the World of Diseases Forever?, Nancy Leys Stepan - http://www.amazon.com/gp/product/0801450586
Mindset: The New Psychology of Success, Carol Dweck - http://www.amazon.com/gp/product/0345472322
The Vital Question: Energy, Evolution, and the Origins of Complex Life, Nick Lane - http://www.amazon.com/gp/product/0393088812
https://news.ycombinator.com/user?id=hullo seems to be the person who included some links. They have clearly been here a while, participates constructively, and doesn't seem to spew out a lot of affiliate links (any, actually, that I can see).
Seems like that shipped sailed a long time ago: there are a lot of people who link to their companies, offer jobs, and that kind of thing here. Making money is not a bad thing - spamming is.
If anyone's interested, I hereby offer to spend the entirety of my ill-gotten affiliate gains on beers if anyone ever visits Bend, Oregon.
I think it's pretty clear from people's posting/comment history whether they're adding them in good faith or not.