At Circle's End (The Mako Saga, #3)

In the months since his disappearance, Danny Tucker has retreated to the darkest corners of Alystierian space, seeking intelligence on the Empire's new chancellor, Alec Masterson. Backed by a crew of outcasts and fighting from the shadows as the enigmatic Rogue centurion, Danny will stop at nothing to achieve his mission—vengeance for the brutal murder of Madisyn Reynolds.

Still, try as he might, Danny can't remain underground forever, and with sightings of the Rogue growing more frequent, ...