The "Chronicles: The Art of War" is a book detailing the creation of the film The Hobbit: The Battle of the Five Armies, focusing on the art, design, and creative process behind the movie's epic battle. It includes concept art, behind-the-scenes photos, and insights from the cast and crew, and also covers other aspects of the film, like the attack on Lake-town and Bilbo's return to the Shire. The book is the final instalment of the Hobbit Chronicles series and features a fold-out battle map.