Amazon.com freak ? Then this is the site for you. A9.com lets you search through amazon.com books using the new site-specific searches powered by google.com. What i like about it is that its no-nonsense, fast and it uses my amazon.com login to remember my searches.

Tip: In the search results trying holding your mouse over the little golden button titled "Site Info" - enjoy !

A9 comes with a host of other features. Here are some of them (detailed version can be found here):

• Searching "inside" the book (need amazon membership) -  This is particularly useful when looking up references across books. I tried this cross referencing Java design patterns across books. Worked out pretty well - i must say !
  


• Adjustable columns - The search results are columnized (web, books & history).


• Quick search -  a9.com/Harry Potter  and press enter (something i wish google would offer). No need to wait for the search box to appear


• Site Info balloon - see fig.


• Click history - marks visited searches seperately. One handy feature when you are search across a huge set of results.


• etc, etc

A9 also comes with its toolbar which might be handy if you get to like this. Personally i prefer quick search. All in all, i think this is a pretty nifty site. I would sure like to see Amazon expand a9's feature to search for books in specific category (say "Computer Science", Gardening, etc).