U.S. mega-chain Barnes & Noble announced in a press release yesterday the creation of the world’s biggest e-book store comprising “more than 700,000 titles, including hundreds of new releases and bestsellers at only $9.99.” Unlike Amazon’s Kindle-only e-books, e-books purchased through B&N’s store will be compatible with a number of platforms (aside from the Kindle, of course): iPhone, BlackBerry, and most Windows and Mac computers. Through a partnership with Google Books, the B&N e-book store will also offer more than 500,000 free and downloadable public domain e-books.

B&N als announced an exclusive agreement to provide e-books for the forthcoming Plastic Logic e-reader, a device that is geared toward business professionals. From Fortune:

Plastic Logic vice president of business development Daren Benzi says his device is geared for business travelers, and as such will support the display of PDF files, Microsoft’s MS Word, Powerpoint, and Excel, as well as newspapers and magazines. But e-books are a big part of the game plan. Will we carry every single one of those 700,000-plus titles? I don’t know. We’ll announce that as we get further along, said Benzi. But we will have access to them all.

Elsewhere in the blogosphere, The Book Oven analyzes how B&N’s move will affect the e-book market.