Air

Nathan is a skilled mage with control over the air, powering ships over a world covered in water. However, under the control of the powerful Lord Ruthen, a mage of fire, he is insignificant, and he is cowed by the memory of Ruthen killing his childhood friend Tom.

But his friend is not dead, and has nurtured his power over water, which is feared by Fire mages. Nathan is swept up not only into Tom's idea of revenge against Ruthen, but into love with the outcast mage.