The book "Arthas: Rise of the Lich King" by Christie Golden explores the tragic story of Arthas Menethil, a prince whose desire to protect his kingdom leads him down a dark path. As he grapples with his responsibilities and the encroaching threat of the undead Scourge, Arthas is faced with critical choices that will ultimately define his fate. His journey showcases the conflict between his noble intentions and the corruption he faces.