The Crystal Gryphon

By Andre Norton

A Witch World story.

The Dales are in danger as invaders from outside move against the lords of the Dales. The invaders have advanced technology, while the Dalesmen are still riding horses and using bows and arrows and swords and armor.
But before the time of the invasion, two children of Dales lords are promised to each other for political reasons. Kerovan's father is worried his people will reject his son as leader because Kerovan is deformed. His eyes have slit pupils instead of round and his feet are hoofed. So allying his son with the daughter of the lord of Ithdale, Joisan, will consolidate his son's position, he hopes.
Joisan and Kerovan are officially wedded, even though they never actually meet and even though they are little kids. Kerovan lives in isolation, away from prying eyes. Joisan lives at Ithkrypt and finds herself pursued by Toross, a cousin, who urges her to repudiate Kerovan and ally with him. At one point Kerovan sends Joisan a crystal gryphon as a gift and she wears it on a chain around her neck.
Joisan and Kerovan never meet before the invaders arrive. Ithkrypt is destroyed and Joisan and company are forced to flee.
Kerovan is ambushed but escapes only to discover that his mother, his sister and his half-brother are the ones who arranged for the ambush. He also finds out that they have turned the locals against him too. He decides he has no future there and travels to Ithdale, only to discover that Ithkrypt is a ruin and Ithdale is overrun by the enemy. He then sets out to find the wife he has never met, Joisan.

This book is told from the two perspectives of Joisan and Kerovan. Much of the story centers on the two as youngsters. It doesn't really start moving until the invasion, when Joisan and Kerovan are just entering adulthood. And when the best made plans go up in smoke as war swallows both their keeps.