The Perfect Assassin (Chronicles of Ghadid, Bk. 1)

Divine justice is written in blood. Or so Amastan has been taught. As a new assassin in the Basbowen family, he's already having second thoughts about taking a life. When unexpected bodies turn up and the victims' murderous jaan start running wild in the dusty streets of Ghadid, Amastan suddenly gets a new job: solve these murders before the family gets blamed.

Every life has its price, but when the tables are turned, Amastan must find this perfect assassin or be their next target.