Percy Jackson and the Olympians, Book Four: The Battle of the Labyrinth (Percy Jackson & the Olympians) by Rick Riordan

Percy Jackson and the Olympians: The Battle of the Labyrinth is the fourth book in Rick Riordan’s series. Percy Jackson and his friends, including Annabeth Chase and Grover Underwood, embark on a dangerous journey through the Labyrinth, a magical and ever-changing maze, to prevent the Titan lord Kronos from invading Camp Half-Blood. Along the way, they encounter various mythical creatures and face numerous challenges. As the labyrinth’s secrets are revealed, Percy discovers more about his own destiny and the looming threat of war against the Titans.