{"schema_version":"bf_book_companion_v1","release_id":"site_cron_amazon_bestseller_frontier_20261107T020001Z","book":{"amazon_purchase_url":"https://www.amazon.com/dp/1423140605?tag=bookfrontie00-20","asin":"1423140605","authors":["Rick Riordan"],"book_id":"9781423140603","canonical_url":"https://bookfrontier.com/books/heroes-of-olympus-the-book-three-the-mark-of-athena-heroes-of-olympus-the-book-three-1423140605","cover_image_url":"https://img.bookfrontier.com/9781423140603.jpg?v=6370662f103b3b97","description":"In The Son of Neptune , Percy, Hazel, and Frank met in Camp Jupiter, the Roman equivalent of Camp Halfblood, and traveled to the land beyond the gods to complete a dangerous quest. The third book in the Heroes of Olympus series will unite them with Jason, Piper, and Leo. But they number only six--who will complete the Prophecy of Seven? The Greek and Roman demigods will have to cooperate in order to defeat the giants released by the Earth Mother, Gaea. Then they will have to sail together to the ancient land to find the Doors of Death. What exactly are the Doors of Death? Much of the prophecy remains a mystery. . . . With old friends and new friends joining forces, a marvelous ship, fearsome foes, and an exotic setting, The Mark of Athena promises to be another unforgettable adventure by master storyteller Rick Riordan. Read more","forthcoming":false,"isbn13":"9781423140603","publication_date":"20121002","publisher":"Disney Publishing Group","slug":"heroes-of-olympus-the-book-three-the-mark-of-athena-heroes-of-olympus-the-book-three","subtitle":"","title":"Heroes of Olympus, The, Book Three: The Mark of Athena-Heroes of Olympus, The, Book Three"},"discovery":{"categories":{"all":[{"bisac_code":"JUV022020","confidence_band":"unbanded","label":"Greek & Roman Myths","score":0.96,"source":"bisac_hint_model"},{"bisac_code":"JUV001000","confidence_band":"unbanded","label":"Action & Adventure","score":0.37,"source":"bisac_hint_model"},{"bisac_code":"JUV037000","confidence_band":"unbanded","label":"Magic & Fantasy","score":0.85,"source":"bisac_hint_model"}],"hint":[{"bisac_code":"JUV022020","confidence_band":"unbanded","label":"Greek & Roman Myths","score":0.96,"source":"bisac_hint_model"},{"bisac_code":"JUV001000","confidence_band":"unbanded","label":"Action & Adventure","score":0.37,"source":"bisac_hint_model"},{"bisac_code":"JUV037000","confidence_band":"unbanded","label":"Magic & Fantasy","score":0.85,"source":"bisac_hint_model"}],"publisher":[{"bisac_code":"JUV001000","confidence_band":"high","label":"Action & Adventure","score":1,"source":"onix_publisher_code"},{"bisac_code":"JUV022020","confidence_band":"high","label":"Greek & Roman Myths","score":1,"source":"onix_publisher_code"},{"bisac_code":"JUV037000","confidence_band":"high","label":"Magic & Fantasy","score":1,"source":"onix_publisher_code"}]},"genres":[{"label":"Greek & Roman Myths","score":0.96,"slug":"greek-roman-myths"},{"label":"Action & Adventure","score":0.37,"slug":"action-adventure"},{"label":"Magic & Fantasy","score":0.85,"slug":"magic-fantasy"}],"reader_fit":["For readers interested in Greek and Roman demigods cooperating.","For readers drawn to quests, prophecies, and mythical foes."],"related_lists":[],"series":null,"similar_books":[{"authors":["Rick Riordan"],"book_id":"9781423141990","cover_image_url":"https://img.bookfrontier.com/9781423141990.jpg?v=504a22780f5abd40","score":0.7798,"title":"Heroes of Olympus, The, Book Two: The Son of Neptune-Heroes of Olympus, The, Book Two","url":"https://bookfrontier.com/books/9781423141990"},{"authors":["Rick Riordan"],"book_id":"9781423113393","cover_image_url":"https://img.bookfrontier.com/9781423113393.jpg?v=fdb4ec1dd0f3e651","score":0.7775,"title":"The Heroes of Olympus, Book One: The Lost Hero","url":"https://bookfrontier.com/books/9781423113393"},{"authors":["Rick Riordan"],"book_id":"9781368051453","cover_image_url":"https://img.bookfrontier.com/9781368051453.jpg?v=8fcf2a3856fbdbb1","score":0.7355,"title":"Percy Jackson and the Olympians, Book Five: The Last Olympian","url":"https://bookfrontier.com/books/9781368051453"},{"authors":["Rick Riordan"],"book_id":"9781368051460","cover_image_url":"https://img.bookfrontier.com/9781368051460.jpg?v=948b83a720fae4d4","score":0.681,"title":"Percy Jackson and the Olympians, Book Four: The Battle of the Labyrinth","url":"https://bookfrontier.com/books/9781368051460"},{"authors":["Rick Riordan"],"book_id":"9781368051484","cover_image_url":"https://img.bookfrontier.com/9781368051484.jpg?v=8abd4f1c33f3aadb","score":0.6476,"title":"Percy Jackson and the Olympians, Book Three: The Titan's Curse","url":"https://bookfrontier.com/books/9781368051484"},{"authors":["Rick Riordan"],"book_id":"9781368107631","cover_image_url":"https://img.bookfrontier.com/9781368107631.jpg?v=56fd2264c5819bb2","score":0.6842,"title":"Percy Jackson and the Olympians: Wrath of the Triple Goddess","url":"https://bookfrontier.com/books/9781368107631"},{"authors":["Rick Riordan"],"book_id":"9781368051477","cover_image_url":"https://img.bookfrontier.com/9781368051477.jpg?v=30ef9f4f18fedda0","score":0.6795,"title":"Percy Jackson and the Olympians, Book One: The Lightning Thief","url":"https://bookfrontier.com/books/9781368051477"},{"authors":["Rick Riordan"],"book_id":"9781368098045","cover_image_url":"https://img.bookfrontier.com/9781368098045.jpg?v=36f63d6f9ca58be7","score":0.6925,"title":"Percy Jackson and the Olympians 5 Book Paperback Boxed Set","url":"https://bookfrontier.com/books/9781368098045"}],"topics":[{"evidence_refs":["goodreads_genre:Fantasy"],"label":"Fantasy","score":1,"slug":"fantasy"},{"evidence_refs":["goodreads_genre:Mythology"],"label":"Mythology","score":0.8889,"slug":"mythology"},{"evidence_refs":["goodreads_genre:Young Adult"],"label":"Young Adult","score":0.7778,"slug":"young-adult"},{"evidence_refs":["goodreads_genre:Middle Grade"],"label":"Middle Grade","score":0.5556,"slug":"middle-grade"},{"evidence_refs":["goodreads_genre:Percy Jackson"],"label":"Percy Jackson","score":0.4444,"slug":"percy-jackson"},{"evidence_refs":["goodreads_genre:Adventure"],"label":"Adventure","score":0.3333,"slug":"adventure"},{"evidence_refs":["goodreads_genre:Greek Mythology"],"label":"Greek Mythology","score":0.2222,"slug":"greek-mythology"},{"evidence_refs":["goodreads_genre:Urban Fantasy"],"label":"Urban Fantasy","score":0.1111,"slug":"urban-fantasy"}],"what_you_get":["Themes: Greek and Roman demigod cooperation, Prophecy and its mysteries, Quest against giants.","Pacing: fast, momentum-driven storytelling.","Story elements: A prophecy to fulfill, Allies join forces."]},"llm_signals":{"confidence":0.85,"pacing":"fast","reader_fit":["For readers interested in Greek and Roman demigods cooperating.","For readers drawn to quests, prophecies, and mythical foes."],"themes":["Greek and Roman demigod cooperation","Prophecy and its mysteries","Quest against giants"],"tropes":["A prophecy to fulfill","Allies join forces"]},"source_presence":{"amazon":true,"book_detail":true,"goodreads":true,"llm_signals":true,"similarity_seed":true},"stats":{"amazon_ratings_count":0,"goodreads_ratings_count":686831,"goodreads_reviews_count":30845,"quality_score":1}}