The Lament of the Highborne is a small book that contains the Thalassian song of the same name. The lament was composed by Derek Duke and Russell Brower and sung by artist Vangie Gunn. It appears on the Burning Crusade soundtrack. The book serves no gameplay purpose, other than to offer the player a chance to reread the lyrics as many times as they wish. The composers have revealed that "the quest design team enhanced a new quest line to incorporate the song as a payoff moment".
The lament can be heard in-game by Lady Sylvanas Windrunner and her Highborne Lamenters (pleasant-voiced banshees) after finding her locket (The Lady's Necklace, a gift from her sister Alleria) at Windrunner Spire in the Ghostlands and returning it to the Dark Lady.