Hexult

Shipwrecked on the frozen seas of an ice world, in a future so distant that the only traces left of our time are shards of glass, fifteen year old twins, Jacob and Elya, are rescued by Aulf, the young mail man, who earns a precarious living sailing his small boat between the treacherous arms of the Vajra Crevasse, to deliver mail to the troubled islands of Hexult.

When the seas rose and the world froze, much technology was lost, and Jacob and Elya's superior knowledge of science leads the su...