Michael Geist shared the link to this story. The works in question are out of print and out of copyright. The e-books are the result of a three year project where the library has been working with Microsoft. As near as I can tell, the books will be specifically formatted for the Kindle. No mention of any other formats. Still, it is a pretty big wind fall for the public domain. I cannot imagine the works would have DRM even if the format is just for the Kindle. We’ll find out for sure this Spring.