{"schema_version":"bf_book_companion_v1","release_id":"20261010T034321Z-reviewed-full-unique-works","book":{"amazon_purchase_url":"https://www.amazon.com/dp/1570917760?tag=bookfrontie00-20","asin":"1570917760","authors":["Julie Ellis"],"book_id":"9781570917769","canonical_url":"https://bookfrontier.com/books/pythagoras-and-the-ratios-9781570917769","cover_image_url":"https://img.bookfrontier.com/9781570917769.jpg?v=393bb9f57c4615c2","description":"Julie Ellis and Phyllis Hornung Peacock team up once again to explore Pythagorean ratios in this humorous sequel to WHAT'S YOUR ANGLE, PYTHAGORAS? Pythagoras and his cousins want to win a music contest, but first they must figure out how to play their instruments in tune, something that's never been done before. While trying to fix the problem, Pythagoras makes an important discovery--notes that sound pleasant together have a certain mathematical relationship. When Pythagoras applies this ratio to his cousins' pipes and lyres, the result is music to the ears.","forthcoming":false,"isbn13":"9781570917769","publication_date":"20100201","publisher":"Charlesbridge","slug":"pythagoras-and-the-ratios","subtitle":"A Math Adventure","title":"Pythagoras and the Ratios"},"discovery":{"categories":{"all":[{"bisac_code":"JNF035050","confidence_band":"medium","label":"Geometry","score":0.7605,"source":"bisac_hint_model"},{"bisac_code":"JNF051200","confidence_band":"medium","label":"Measures & Weights","score":0.7231,"source":"bisac_hint_model"},{"bisac_code":"JNF035040","confidence_band":"medium","label":"Fractions","score":0.704,"source":"bisac_hint_model"}],"hint":[{"bisac_code":"JNF035050","confidence_band":"medium","label":"Geometry","score":0.7605,"source":"bisac_hint_model"},{"bisac_code":"JNF051200","confidence_band":"medium","label":"Measures & Weights","score":0.7231,"source":"bisac_hint_model"},{"bisac_code":"JNF035040","confidence_band":"medium","label":"Fractions","score":0.704,"source":"bisac_hint_model"}],"publisher":[{"bisac_code":"JNF025020","confidence_band":"high","label":"Ancient History for Kids","score":1,"source":"onix_publisher_code"},{"bisac_code":"JNF035050","confidence_band":"high","label":"Geometry","score":1,"source":"onix_publisher_code"},{"bisac_code":"JNF036090","confidence_band":"high","label":"Instruments","score":1,"source":"onix_publisher_code"}]},"genres":[{"label":"Geometry","score":0.7605,"slug":"geometry"},{"label":"Measures & Weights","score":0.7231,"slug":"measures-weights"},{"label":"Fractions","score":0.704,"slug":"fractions"}],"reader_fit":["Good for readers interested in math explored through music and a humorous adventure"],"related_lists":[],"series":null,"similar_books":[{"authors":["Julie Ellis"],"book_id":"9781570911507","cover_image_url":"https://img.bookfrontier.com/9781570911507.jpg?v=52e1c368f94a7382","score":0.8283,"title":"What's Your Angle, Pythagoras?","url":"https://bookfrontier.com/books/9781570911507"},{"authors":["Stuart J. Murphy"],"book_id":"9780064467223","cover_image_url":"https://img.bookfrontier.com/9780064467223.jpg?v=e080ff0b804b169c","score":0.6726,"title":"Rabbit's Pajama Party","url":"https://bookfrontier.com/books/9780064467223"},{"authors":["David A. Adler"],"book_id":"9780823460694","cover_image_url":"https://img.bookfrontier.com/9780823460694.jpg?v=f08f2b69791f041c","score":0.6713,"title":"Graphs!","url":"https://bookfrontier.com/books/9780823460694"},{"authors":["Alfred S. Posamentier","Ingmar Lehmann"],"book_id":"9781616145873","cover_image_url":"https://img.bookfrontier.com/9781616145873.jpg?v=8b7cb1ea48c12561","score":0.671,"title":"Secrets of Triangles","url":"https://bookfrontier.com/books/9781616145873"},{"authors":["David A. Adler"],"book_id":"9780823444403","cover_image_url":"https://img.bookfrontier.com/9780823444403.jpg?v=62b3a9560ac9dfd2","score":0.6671,"title":"Squares, Rectangles, and Other Quadrilaterals","url":"https://bookfrontier.com/books/9780823444403"},{"authors":["Aliki"],"book_id":"9780064462365","cover_image_url":"https://img.bookfrontier.com/9780064462365.jpg?v=d31fde8bd9a3134d","score":0.6635,"title":"Ah, Music!","url":"https://bookfrontier.com/books/9780064462365"},{"authors":["Cindy Neuschwander"],"book_id":"9781570917721","cover_image_url":"https://img.bookfrontier.com/9781570917721.jpg?v=0f623e12cfc69677","score":0.6576,"title":"Sir Cumference and the Fracton Faire","url":"https://bookfrontier.com/books/9781570917721"},{"authors":["Dan Green"],"book_id":"9780753465974","cover_image_url":"https://img.bookfrontier.com/9780753465974.jpg?v=f36dd695d8bb17f2","score":0.6519,"title":"Basher Science: Algebra and Geometry","url":"https://bookfrontier.com/books/9780753465974"}],"topics":[{"evidence_refs":["keyword:picture book"],"label":"Picture","score":0.1279,"slug":"picture"},{"evidence_refs":["keyword:learning math"],"label":"Learning","score":0.0532,"slug":"learning"},{"evidence_refs":["keyword:music"],"label":"Music","score":0.0456,"slug":"music"},{"evidence_refs":["keyword:ancient greece"],"label":"Ancient","score":0.0259,"slug":"ancient"},{"evidence_refs":["keyword:math"],"label":"Math","score":0.0244,"slug":"math"}],"what_you_get":["Themes: Mathematical ratios, Music and harmony.","Themes: Picture, Learning, Music.","Reading lane: Geometry and Measures & Weights."]},"llm_signals":{"confidence":0.91,"pacing":"unknown","reader_fit":["Readers interested in math explored through music and a humorous adventure"],"themes":["Mathematical ratios","Music and harmony"],"tropes":[]},"source_presence":{"amazon":true,"book_detail":true,"goodreads":true,"llm_signals":true,"similarity_seed":true},"stats":{"amazon_ratings_count":141,"goodreads_ratings_count":107,"goodreads_reviews_count":10,"quality_score":0.879}}