The new, eagerly anticipated Batman Young Adult novel is an action-packed thrill ride that could only be penned by #1 New York Times-bestselling author Marie Lu. Before he was Batman, he was Bruce Wayne. The Nightwalkers are terrorizing Gotham City, and Bruce Wayne is next on their list. About to turn eighteen and inherit his family's fortune, Bruce makes an impulsive choice and is sentenced to community service at Arkham Asylum, the infamous prison that holds the city's most nefarious criminals. The most intriguing inmate in Arkham is Madeleine, a brilliant girl with ties to the Nightwalkers. A girl who will only speak to Bruce. She is the mystery he must unravel, but is he convincing her to divulge her secrets, or is he feeding her the information she needs to bring Gotham City to its knees?