Sanction (Jakob’s Ladder 2)

Even as Perceval, the new captain, struggled to come to terms with the traumas of her past, the remnants of rebellion aboard the ship still threaten the crew’s survival.
Yet as Perceval’s relatives Tristen and Benedick play a deadly game of cat and mouse in pursuit of a traitor through a cast ship that is renewing itself in strange and dangerous ways, an even more insidious threat is building in a place no one ever thought to look. And this implacable enemy could change the face of the ship forever if a ragtag band of heroes cannot stop it.
Originally published in 2010 as Chill.