With the Amazon Associate program you can link to Amazon about books from your site and, if someone buys the book, you get somewhere between 4% and 8.5% commission on the purchase. Not bad.
The aStore is similar. It is a place where you can list and categorize books. If someone buys a book through your aStore, then you get some commission. Both seem like nice programs.
My aStore has books that I have liked in tech and Greek and would recommend, and lists of books that I find interesting but have not yet read.
I like books a lot. It is the main type of adornment in my study. When some people or sad about something they eat ice cream or chocolate. I either eat a steak or buy a book...or both.