Blue Moon by Alyson Noël is the second book in the Immortals series. The story follows Ever Bloom, a teenage girl who can see people's auras and hear their thoughts, after a tragic accident that killed her family. In Blue Moon, Ever is struggling with her new life as an immortal and her relationship with her boyfriend, Damen, who is also an immortal. However, she faces challenges when a powerful enemy, Roman, tries to separate her from Damen and take away her powers. Ever must navigate these dangers while grappling with the complexities of immortality, love, and the consequences of her choices. The novel explores themes of love, trust, and the battle between good and evil.