The Starfall Prophecy, Shadow Apocalypse, Book Two

After narrowly escaping from Ashen 2, Robert Hewson and the crew of the URM Starglider Cleopatra find themselves imprisoned on the far side of the galaxy by an enemy that seems hell bent on their destruction.
Back home on Mars, the leaders of the Sanctuary launch a mission to locate the Cleopatra, but before long another crew, among them Kate Hewson, become engaged in their own cruel game of survival.
To escape the confines of their prison planet, Robert Hewson must learn the truth about their mysterious captor, but to defeat this enemy, he and the others will be forced to make a choice and gamble on their very existence.