Mass Effect3 books in series
Mass Effect Publisher's Summary
On the edge of colonized space, ship commander and Alliance war hero David Anderson investigates the remains of a top secret military research station---smoking ruins littered with bodies and unanswered questions. Who attacked this post, and for what purpose? And where is Kahlee Sanders, the young scientist who mysteriously vanished from the base hours before her colleagues were slaughtered?
Sanders is now the prime suspect, but finding her creates more problems for Anderson than it solves. Partnered with a rogue alien agent he can't trust, and pursued by an assassin he can't escape, Anderson battles impossible odds on uncharted worlds to uncover a sinister conspiracy...one he won't live to tell about. Or so the enemy thinks.