The Elven Nations Trilogy

The leader of the Silvanesti dies, leaving his twin sons to promote very different course for the elves they lead equally. Other nations see only weakness in the elves, and the brothers cannot lay aside their own differences to lead their people when a bitter territory war begins. It becomes a war of elf against elf, of isolation versus connection, until Kith-Kanan and his followers found the homeland of Qualinost. But their troubles do not stop there.