You can now download John Scalzi's The Tale of the Wicked for only 0.99$ here.
Here's the blurb:
Captain Michael Obwije of the Confederation Armed Forces has been hunting a Tarin battle cruiser in a dangerous game of cat-and-mouse. But when he orders his own ship in for the killing blow, the hot pursuit turns into a potentially more dangerous situation. One with implications for the entire Confederation.