"The Girl in the Tower" is a fantasy novel by Katherine Arden, part of the Winternight Trilogy. It follows the story of Vasilisa, a young girl in medieval Russia who possesses magical abilities. As she navigates the challenges of her world, she faces threats from both human and supernatural forces. The novel explores themes of family, loyalty, and the struggle between tradition and change. Set against the backdrop of Russian folklore, it features mythical creatures and rich cultural elements, highlighting the importance of storytelling and the connection to one's heritage.