Tranquility — Dave Creek

An explosion in Tranquility City on the Moon kills 14-year-old Dacia Stark's parents and sends her on a quest to find Julian Walker, the terrorist who admitted to the crime. Now a detective on Tranquility's police force, Dacia has seen more than her share of blood, death, and grief. But that's only stiffened her resolve, not just to track Walker down -- but to kill him.