About the Book: Return to the thrilling world of Percy Jackson with this official companion to the Heroes of Olympus series, where mysterious events threaten the peace of Camp Jupiter after Gaea’s defeat. Through Claudia’s diary, readers uncover hidden secrets, investigate magical crime scenes, and unravel an ancient mystery that could determine the camp’s future. Packed with Greek and Roman mythology, adventure, humor, and exclusive insights, this companion book is a must-read for fans of Rick Riordan’s fantasy universe.