The Last Enchantment is the final book of The Merlin Trilogy, bring the life and deeds of Merlin the Enchanter to a satisfactory conclusion.
The Last Enchantment sees Arthur rise to the position of High King of Britain, with Merlin as his advisor and protector. The book also sees Merlin, in his later years, finally accept the love of a woman, Niniane, who becomes his apprentice, learning all of his arts and continuing the position of advisor, protector, and sorceror for King Arthur. Merlin’s story is left open at the end, as he bids farewell to Arthur, asking when his next visit will be. Merlin has completed his life’s work and is now content and at peace; a just reward for his lifetime of efforts and sacrifice.
-Because I said so