Fading Amber (The Cambion Chronicles #3)

After falling for a Cambion and then turning into one herself, Samara never thought her senior year could get any more complicated. The gaps in her memory, the mysterious deaths and the constant danger that threaten her once quiet town have a common thread: Tobias, a demon with a lot of enemies. He's also Samara's other soul mate and he's suddenly disappeared. But Samara isn't the only one who wants to find Tobias. His enemies are getting closer and their plans for retribution could mean deadly consequences for Samara and her true soul mate, Caleb.