The Book of Water (Dragon Quartet, Vol. Two)
by M. Bradley Kellogg
Category: Young adult fiction

In The Book of Fire and The Book of Air, the final two novels of The Dragon Quartet series, dragons Earth and Water, and their human companions, go up against Fire, who has chosen to become a god instead of a guardian, and search for Air, who has disappeared, as the World teeters on the edge of extinction.