I signed up to Bout of Books 10! I participated in the last one and I'm sure it will be as good this time, though I might have exams then[booooo!] :)
Here's what Bout of Books is about:
The Bout of Books read-a-thon is organized by Amanda @ On a Book Bender and Kelly @ Reading the Paranormal. It is a week long read-a-thon that begins 12:01am Monday, May 12th and runs through Sunday, May 18th in whatever time zone you are in. Bout of Books is low-pressure, and the only reading competition is between you and your usual number of books read in a week. There are challenges, giveaways, and a grand prize, but all of these are completely optional. For all Bout of Books 10 information and updates, be sure to visit the Bout of Books blog. - From the Bout of Books team
If you want to sign up go HERE. It ends on May 13th.