Bookalizer.com (
http://www.bookalizer.com/) is a web service that allows you to display customised Amazon book ads on your homepage according to the content of the respective page. You can either specify the key words by which books are selected by yourself, or provide a set of Amazon product IDs or have Topicalizer select the most appropriate key words automatically.
The service is organised by a German organisation called Clever Spenden e.V., which donates the revenues of affiliate services to a good cause.
Please have a look at their weblog as well:
http://bookadmin.blogspot.com/
