City of Bones / City of Ashes / City of Glass (The Mortal Instruments Series #1-3) by Cassandra Clare
In City of Bones, the handsome Jace introduces fifteen-year-old Clary Fray to the world of the Shadowhunters, a secret cadre of warriors dedicated to driving demons out of our world. She’s sure that Valentine, the evil and powerful Shadowhunter, is responsible for her mother’s disappearance, but she’s about to discover much more….
In the second book, City of Ashes, Clary’s mother remains in a mysterious coma, and danger abounds now that the Shadowhunter world knows Valentine is still alive—and that Clary and Jace are his children. Will Valentine succeed in making the Mortal Instruments his forever?
In book three, City of Glass, Clary has to use all her ingenuity and newfound magical skills to get herself to the secretive Shadowhunters’ home country in an attempt to cure her mother’s enchanted sleeping sickness. When Valentine attacks the city and destroys the demon towers, the past tangles inextricably with the present as Clary and Jace face down their father.