Yes indeedy – for your Kindle software – for which you do not need a kindle device. The software is downloadable to your computer.
So, if you don’t know if you’d like an ebook, check out the best selling Kindle offerings and see if you can find yourself a freebie you might like. Most of those books are 9.99, but some with some careful searching, you will find some that are at no cost or very inexpensive. Amazon keeps track of what you’ve bought so you can download it again if you lose it. Pretty cool.
They also have an RSS feed for new releases.