Dungeons & Dragons: Dungeon Academy: Last Best Hope

"Zelli Stormclash and the Danger Club have only one goal: save their friend Bauble from the evil clutches of Elgred Morbide. There's only one problem--the evil machinations of Morbide's selfish plots have come to a head, and the final battle for Dungeon Academy has already begun. Deep beneath the desert, a monstrous dracolich is about to be unleashed--an evil, undead dragon bent on revenge against everything in her path"--