Playing around with Amazon associates

I thought I'd have a play around with the Amazon associates scheme and see how well their automatic book adverts actually work. In theory after 4 or 5 people visit each page on my blog the books or products advertised should be relevant to the content in my blog.

So far I have noticed that the books advertised on the home page are definitely narrowboat related, so maybe it will be of interest to someone, or maybe just for me :)