"Rebel Angels" is a fantasy novel by Libba Bray, part of the Gemma Doyle Trilogy. Set in the late 19th century, it follows the story of Gemma Doyle, a young girl with magical abilities who discovers a hidden realm called the Realms. The novel explores themes of friendship, power, and the struggle between good and evil. In "Rebel Angels," Gemma and her friends navigate the complexities of their lives while facing dark forces that threaten their world. The narrative combines elements of historical fiction and supernatural adventure, making it a captivating read for fans of young adult literature.