An in-world companion guidebook to Camp Half-Blood, the demigod training camp at the heart of Rick Riordan's Percy Jackson universe. Framed as a guide the campers wrote themselves: after enduring an awful orientation video made by the god Apollo, Percy Jackson and his friends decide to put together their own honest handbook for new demigods, answering the questions a nervous newcomer would actually ask, from "What is this place?" to "Do I get to keep the T-shirt?" Narrated by Percy and other familiar campers, the book is organized like a real orientation manual, with sections on the divine cabins for each god's children, magical landmarks around camp, and the training arenas where demigods learn to fight. The centaur Chiron opens the guide with a short history of hero training drawn from his millennia of experience, and the demigod authors carefully include some divine words of wisdom from Apollo so as not to be smited for leaving him out. Short first-person stories from heroes who have lived at or passed through camp are sprinkled throughout, giving the reference material a personal, anecdotal flavor. At around 192 pages, it is a lighter, illustrated companion rather than a novel, best enjoyed by readers who already know the series and want an immersive insider tour of camp.