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For more than seventy years, Penguin has been the leading publisher of classic literature in the English-speaking world. With more than 1,700 titles, Penguin Classics represents a global bookshelf of the best works throughout history and across genres and disciplines. Readers trust the series to provide authoritative texts enhanced by introductions and notes by distinguished scholars and contemporary authors, as well as up-to-date translations by award-winning translators.","forthcoming":false,"isbn13":"9780140455052","publication_date":"20080930","publisher":"Penguin Publishing Group","slug":"two-lives-of-charlemagne","subtitle":"","title":"Two Lives of Charlemagne"},"discovery":{"categories":{"all":[{"bisac_code":"HIS037010","confidence_band":"medium","label":"Medieval History","score":0.7532,"source":"bisac_hint_model"},{"bisac_code":"HIS027230","confidence_band":"medium","label":"Medieval Warfare","score":0.7391,"source":"bisac_hint_model"},{"bisac_code":"HIS002020","confidence_band":"medium","label":"Ancient Rome","score":0.7256,"source":"bisac_hint_model"}],"hint":[{"bisac_code":"HIS037010","confidence_band":"medium","label":"Medieval History","score":0.7532,"source":"bisac_hint_model"},{"bisac_code":"HIS027230","confidence_band":"medium","label":"Medieval Warfare","score":0.7391,"source":"bisac_hint_model"},{"bisac_code":"HIS002020","confidence_band":"medium","label":"Ancient Rome","score":0.7256,"source":"bisac_hint_model"}],"publisher":[{"bisac_code":"BIO006000","confidence_band":"high","label":"Lives in History","score":1,"source":"onix_publisher_code"},{"bisac_code":"HIS013000","confidence_band":"high","label":"French History","score":1,"source":"onix_publisher_code"},{"bisac_code":"HIS037010","confidence_band":"high","label":"Medieval History","score":1,"source":"onix_publisher_code"}]},"genres":[{"label":"Medieval History","score":0.7532,"slug":"medieval-history"},{"label":"Medieval Warfare","score":0.7391,"slug":"medieval-warfare"},{"label":"Ancient Rome","score":0.7256,"slug":"ancient-rome"}],"reader_fit":["Good for readers interested in accounts of Charlemagne's life","Good for readers interested in historical biographies from differing perspectives"],"related_lists":[],"series":null,"similar_books":[{"authors":["Jean de Joinville","Geoffroy de Villehardouin"],"book_id":"9780140449983","cover_image_url":"https://img.bookfrontier.com/9780140449983.jpg?v=9fdfcb66822ad3f2","score":0.7335,"title":"Chronicles of the Crusades","url":"https://bookfrontier.com/books/9780140449983"},{"authors":["Matthew Gabriele","David M. 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