As if it's not easy enough to spend money on books:
You might (
might) want to check out
zoomii.com, which provides a sort of "front end" to amazon.com. It allows you to "shelfcrawl" the way you would in a bricks-and-board store. If you decide to buy, you still go through amazon...or, of course, you're free not to buy, either.
I haven't decided yet whether I like it or not, although I think it might work well helping me identify books I want to buy (without regard to where I eventually buy them.)
Browsing library stacks or bookshelves is the one thing I miss most about old-fashioned stores and libraries. Zoomii may satisfy some of that.