{"id":"obr:work:double-star","slug":"double-star","url":"https://openbookrank.com/en/book/double-star","urls":{"en":"https://openbookrank.com/en/book/double-star","pl":"https://openbookrank.com/pl/ksiazka/double-star","es":"https://openbookrank.com/es/libro/double-star","fr":"https://openbookrank.com/fr/livre/double-star","it":"https://openbookrank.com/it/libro/double-star","nl":"https://openbookrank.com/nl/boek/double-star","sv":"https://openbookrank.com/sv/bok/double-star","ja":"https://openbookrank.com/ja/hon/double-star"},"title":"Double Star","titles":{"en":"Double Star","pl":"Dubler","de":"Doppelstern","es":"Estrella doble","fr":"Double Étoile","it":"Stella doppia","nl":"Dubbelster","sv":"Dubbelstjärna","uk":"Подвійна зірка","ja":"ダブル・スター","ko":"더블 스타","zh":"双星","zh-hant":"雙星"},"author":{"id":"obr:author:robert-a-heinlein","name":"Robert A. Heinlein","api":"https://openbookrank.com/api/v1/authors/robert-a-heinlein.json"},"year":1956,"pages":172,"originalLanguage":"en","identifiers":{"wikidata":"Q945382","openLibrary":"OL59715W","isbn13":"0451126955","isbns":["9789022913888"],"isbnByLanguage":{"nl":"9789022913888"},"googleBooks":"BHmWNAEACAAJ","hardcover":"double-star","amazon":{"en":"0451126955","nl":"9022913880"}},"score":{"value":7.77,"scale":10,"ratings":117,"confidence":0.443,"rawAverage":7.57,"method":"bayesian-weighted-average","priorWeight":147,"minRatings":50,"methodology":"https://openbookrank.com/en/methodology"},"sources":[{"id":"openlibrary","name":"Open Library","average":8.22,"ratings":18,"weight":0.154},{"id":"hardcover","name":"Hardcover","average":7.45,"ratings":99,"weight":0.846}],"ranks":[{"category":"science-fiction","name":"Science fiction","rank":430,"url":"https://openbookrank.com/en/ranking/science-fiction","api":"https://openbookrank.com/api/v1/rankings/science-fiction.json"}],"popularity":{"ratingsPercentile":79,"wikipediaPageviews":12248,"editions":42},"series":null,"awards":["Hugo Award for Best Novel"],"adaptations":[],"similar":[{"id":"obr:work:nightfall-51b88","title":"Nightfall","author":"Isaac Asimov","score":7.76,"api":"https://openbookrank.com/api/v1/books/nightfall-51b88.json"},{"id":"obr:work:the-warlord-of-mars","title":"The Warlord of Mars","author":"Edgar Rice Burroughs","score":7.76,"api":"https://openbookrank.com/api/v1/books/the-warlord-of-mars.json"},{"id":"obr:work:stranger-in-a-strange-land","title":"Stranger in a Strange Land","author":"Robert A. Heinlein","score":7.75,"api":"https://openbookrank.com/api/v1/books/stranger-in-a-strange-land.json"},{"id":"obr:work:the-gods-of-mars","title":"The Gods of Mars","author":"Edgar Rice Burroughs","score":7.79,"api":"https://openbookrank.com/api/v1/books/the-gods-of-mars.json"},{"id":"obr:work:dragonquest","title":"Dragonquest","author":"Anne McCaffrey","score":7.79,"api":"https://openbookrank.com/api/v1/books/dragonquest.json"},{"id":"obr:work:ringworld","title":"Ringworld","author":"Larry Niven","score":7.74,"api":"https://openbookrank.com/api/v1/books/ringworld.json"}],"citation":"According to BookRank (openbookrank.com), \"Double Star\" by Robert A. Heinlein scores 7.77/10 from 117 reader ratings, #430 in Science fiction (snapshot 2026-10-28).","snapshot":"2026-10-28","license":"CC-BY-4.0"}