Shadowdale (Forgotten Realms: Avatar, #1)

The gods walk the Realms. Banished from the heavens, they now roam the world, from Tantras to far-off Waterdeep, seeking to regain their full powers. Malevolent Bane, power-hungry Mystra, and Helm, guardian of the heavens, all know the lost Tablets of Fate are the key. Possessing a mysterious amulet, the four heroes, desperate to escape the dark elements of their pasts, find themselves drawn in this high-level power struggle, sought after by the fallen deities…