D&D Hoard of the Dragon Queen Book

In an audacious bid for power the Cult of the Dragon, along with its dragon allies and the Red Wizards of Thay, seek to bring Tiamat from her prison in the Nine Hells to Faerun. To this end, they are sweeping from town to town, laying waste to all those who oppose them and gathering a hoard of riches for their dread queen.