Reborn - Jennifer Rush

The Branch is in shambles, but Anna, Sam, Cas, and Nick can't rest easy. Remnants of the organization lurk unseen and the flashbacks to their old lives are only getting stronger--especially Nick's.
Following scattered memories and clues from his Branch file, Nick sets off alone in search of answers and in search of the girl who haunts his dreams. But the sleepy town where she lives is full of secrets, and Nick soon learns that uncovering their shared past may have deadly consequences.
With new characters, new twists, and new genetic alterations, this third book takes the Altered series in an exciting direction that will have readers on the edge of their seats.