Great deal. Two books for the price of one.
This series combines space opera with exciting space battles.
Damascus "Mac the Knife" Steele is a former officer of the Hereditary Republic of Caledonia Navy. When he's hired by a former HRCN vice admiral, with a reputation for recklessness, to command a mercenary Q-ship, his life gets much more interesting as he encounters pirates who are not what they seem to be.
In Steele's Demon Star, he stumbles across a fantastic astronomic discovery that not only threatens to crush his ship but contains a secret that could also threaten the entire human race.