The Centaur's Daughter — Ellen Jensen Abbott

Abisina had found a home in Watersmeet--the community her father led until he was killed by the evil White Worm. But now, Watersmeet is as divided as the village she fled as an outcast. The land faces a new threat, and an uneasy alliances between the humans and the creatures will have to be formed to survive. If Abisina doesn't become the leader Watersmeet needs, she may lose everything. But can she take her father's place? This powerful and moving fantasy deals with timely issues about identity, prejudice, and war.