Osiris (Derek Cross Series)

Captain Derek Cross is a military commander, trying to come to grips with his past. A father killed in the line of duty, an estranged best friend, and a colonist he killed all weigh heavily on his mind. After a botched mission to Ganymede, during which nearly half his unit is killed, he's given a choice - travel to another solar system to help establish a new colony, or accept a discharge from the military. Things go from bad to worse when, en-route to the site of the new colony, he's awakened from cryogenic sleep by Dr. Elena Brown, the mission's medical officer, to find that the colony ship has been hijacked. All of Captain Cross' skills are put to the test as he tries to protect the nearly four hundred sleeping colonists - colonists who have no idea they're in danger. Protecting the most technologically advanced ship ever created, Osiris, and its passengers is one thing, but earning Elena's trust is another thing entirely.