Mystic Island

Nichole is dead, and the remaining demigods are ending their normal school year, moving onto high school. But not before summer of course.

But while everything seemed to be at a temporary peace, the immortal demigod, Heather, warns Raine that there are two other demigods, their true lineage hidden from everyone, including themselves. The two girls just happen to go to Dumbarton Middle as well.....

And then Heather herself goes missing.