Heroes of the Horde, Book 2: Siege By Jennifer Hartz

Six high school students obtained amazing superpowers from their school's demonic legend and unleash the demonic Horde. As their new powers grow, they have to find a way to contain what they unleashed before the evil spreads beyond the school.

Last year's battle was just the beginning for The Heroes of the Horde members. After a brief summer break, the sophomores return to Deacon Propriety School. Romantic squabbles and insecurities kick into high gear within the group. With old friendships on the verge of crumbling, the team barely hangs on by a thread.

But they need to get their act together because the demonic Horde remains intent on stealing their superpowers back, even if it means using their friends, family, and loved ones to do their dirty work. Can the Heroes put their personal issues aside long enough to locate the source of the Horde, or will petty jealousy tear them apart from the inside?