"The Girl Who Drank the Moon" is a fantasy novel by Kelly Barnhill. It tells the story of a young girl named Luna who is raised by a kind witch named Xan. Each year, the people of the Town sacrifice a baby to the witch, believing it will keep them safe. However, Xan rescues the babies and finds them loving homes. As Luna grows, she accidentally drinks moonlight, which gives her magical powers. The story explores themes of love, sacrifice, and the importance of family. Luna must learn to control her powers while uncovering the truth about her past and the town's dark secrets.