Le Cycle de Pendragon, tome 2

He was born to greatness, the son of a druid bard and a princess of lost Atlantis. A trained warrior, blessed with the gifts of prophecy and song, he grew to manhood in a land ravaged by the brutal greed of petty chieftains and barbarian invaders. Merlin: Respected, feared and hated by many, he was to have a higher destiny. For it was he who prepared the way for the momentous event that would unite the Island of the Mighty -- the coming of Arthur Pendragon, Lord of the Kingdom of Summer.