Guardian of Secrets by Brenda Drake
Saving him could end her world. When the Wizard Council sends Gia Kearns to the small town of Branford, Connecticut, she thinks life in hiding with her family, friends, and Arik in tow won't be all that dreadful. But she was wrong. Nick struggles to control his growing powers, Deidre and Pop are getting close, and a neighbor girl captures Arik's attention. Jealousies and mistrusts arise within the tight group, making life in the idyllic East Coast town anything but charming. As Gia and Nick jump to some of the most stunning libraries in search for the remaining Chiavi, a new threat arises within the libraries. During one of their searches, Gia trips a trap door in one of the libraries, sending her and Bastien to a wasteland full of danger and secrets. To return to her family and friends, Gia will have to make a sacrifice, one that will cost her someone she loves.