You can earn a 8%
commission by selling Principles and Practice of Constraint Programming - CP 2003: 9th International Conference, CP 2003, Kinsale, Ireland, September 29 - October 3, 2003, Proceedings (Lecture Notes in Computer Science)
on your website. It's easy to get started - we will give you example code.
After you're set-up, your website can earn you money while you work, play or even sleep!
You should start right now!