Unbridled Books is one of my new favorites, so I'm excited about this opportunity. If any of these titles come close to Safe From the Sea or Miss Entropia and the Adam Bomb (I haven't written a review for this one yet, but it was great,) then we're all in for a treat.
The titles are all Google eBooks, and will be available for 25 cents via IndieCommerce websites...which you can find at this IndieBound page.
Here's a list of the 25 books, including blurbs and cover photos. Spread the word, and get in on the fun!