This is book number 15 in the Fearless series.
Gaia returns to New York. She's living with her father, she's with Sam, and she's even hanging out with Ed again. But Ed has a secret-one that's tearing him apart.
Meanwhile, an imprisoned Loki receives word that Gaia is back in the States. Overwhelmed with rage, he vows to escape and exact revenge on Tom-and take Gaia back forever.