I have long had a book section on my website with links through to amazon.com and amazon.uk to make it easy to order the books. (Disclosure: I am an Amazon affiliate and I so I earn a small percentage on most items that your order.)
I also have an Amazon banner ad on the left hand side of most of my pages which I have cleverly programmed to display ads pertinent to the topic of the page. Using the keywords I provide, Amazon determines the books to display in this panel and so they are not necessarily ones I would recommend but it makes a great serendipitous search and I often spot interesting books that I was not aware of.
These features have been on my site for many years and recently I thought I would take a look to see what Amazon had done to update things and found that I could actually create my own Amazon stores. What's more, the effort was trivial. So you will now find a stand-alone Gurteen Knowledge Amazon.com store and a Gurteen Knowledge Amazon.co.uk store and also find them embedded on my site: Amazon.com and Amazon.co.uk.
I have yet to fully configure the stores with the books and products I would recommend but take a look at the work in progress. You will find a lot of good KM books in both stores.
Its all very easy to do and those of you with your own sites or blogs might like to take a look and build your own store!