An anonymous reader writes "Windows users will be able to use a new Kindle Books application to purchase, download and read e-book titles from Amazon's Kindle Store service. The PC application will be offered as a free download and will support Windows 7, Vista and XP systems. The news comes as Amazon is suddenly finding itself with a fresh crop of competitors in the e-book reader market. Earlier this week hardware vendor Spring Design entered the market with its Alex device, while publisher/retailer Barnes and Noble presented an even more serious challenge to Kindle when it unveiled its Nook reader device." Worth noting, if you're in the market for any such device: the base Kindle's price is now down to $259.