Lucifer's Nebula: Lucifer's Star, Book 2 (Unabridged‪)‬

From the best-selling author of The Rules of Supervillainy: Captain Cassius Mass can only run so far from his problems and the galaxy isn't big enough to hide from those pursuing him. Cassius soon finds himself blackmailed into a mission that will clear him of all charges as well as protect him from future persecution: bring an end to the civil war currently racking the galaxy. Accompanied by a new set of untrustworthy allies, the crew of the Melampus, and the A.I duplicate of his dead wife - Cassius needs to figure out how to not only deal with his target but also his employers. 

Because the entire universe is at stake.