Necromancer Unleashed. Stones of Amaria, #2

For three long months, Dawn awaits her fate while rotting in a dungeon. But when a stroke of luck finally springs her free, her punishment is far from over. Five of the six Stones of Amaria have been activated. Only the onyx remains. Someone is determined to help Ryze return so he can rule Amaria with a crushing fist-but Dawn still doesn't know who. Guard the stone, her brother told her. She vows to do exactly that while hunting down a murderer-or murderers.
While Dawn stalks the halls of Necromancer Academy once again, it becomes painfully clear that no one is as they seem. But one thing is certain-time is running out to stop Ryze from returning.