This was, sadly, only brought to my attention this morning, but Tor has put up for download 24 books in DRM-Free digital form. The reason it’s sad? You’ve got ’til tomorrow to download them.
The haul includes “Old Man’s War” by John Scalzi, recently reviewed here. I can also recommend “Mistborn” by Brandon Sanderson, the man tapped to finish out Robert Jordan’s “Wheel of Time” series.
I’m sure there are many more books here worth reading – go get them while you can!