"The balance is not restored. The knot--the endless knot--is still unraveling."

Fires rage in Albion: strange, hidden fire, dark-flamed, invisible to the eye. In the midst of it, Llew must journey to the Foul Land to redeem his greatest treasure. As the last battle begins, the myths, passions, and heroism of an ancient people come to life . . .  and Llew Silverhand will face a challenge that will test his very soul.

The ancient Celts admitted no separation between this world and the Otherworld: the two were delicately interwoven, each dependent on the other. The Endless Knot crosses the thin places between this world and that, as Llew begins his ultimate quest, striking the final resounding chord in the Song of Albion.