{"id":"obr:work:orphans-of-the-sky","slug":"orphans-of-the-sky","url":"https://openbookrank.com/en/book/orphans-of-the-sky","urls":{"en":"https://openbookrank.com/en/book/orphans-of-the-sky","es":"https://openbookrank.com/es/libro/orphans-of-the-sky","fr":"https://openbookrank.com/fr/livre/orphans-of-the-sky","it":"https://openbookrank.com/it/libro/orphans-of-the-sky"},"title":"Orphans of the Sky","titles":{"en":"Orphans of the Sky","de":"Orphans of the Sky","es":"Huérfanos del espacio","fr":"Les Orphelins du ciel","it":"Universo","nl":"Orphans of the Sky","sv":"Vilse i universum","uk":"Пасинки неба","ja":"宇宙の孤児","ko":"조던의 아이들","zh":"流浪中的都市太空船"},"author":{"id":"obr:author:robert-a-heinlein","name":"Robert A. Heinlein","api":"https://openbookrank.com/api/v1/authors/robert-a-heinlein.json"},"year":1963,"pages":128,"originalLanguage":"en","identifiers":{"wikidata":"Q1114499","openLibrary":"OL59738W","isbn13":null,"isbns":[],"isbnByLanguage":{},"googleBooks":null,"hardcover":"orphans-of-the-sky","amazon":null},"score":{"value":7.55,"scale":10,"ratings":59,"confidence":0.286,"rawAverage":7.05,"method":"bayesian-weighted-average","priorWeight":147,"minRatings":50,"methodology":"https://openbookrank.com/en/methodology"},"sources":[{"id":"openlibrary","name":"Open Library","average":7,"ratings":8,"weight":0.136},{"id":"hardcover","name":"Hardcover","average":7.06,"ratings":51,"weight":0.864}],"ranks":[{"category":"science-fiction","name":"Science fiction","rank":642,"url":"https://openbookrank.com/en/ranking/science-fiction","api":"https://openbookrank.com/api/v1/rankings/science-fiction.json"}],"popularity":{"ratingsPercentile":69,"wikipediaPageviews":23111,"editions":33},"series":{"id":"obr:series:future-history","slug":"future-history","title":"Future History","position":null,"volumes":30,"api":"https://openbookrank.com/api/v1/series/future-history.json"},"awards":[],"adaptations":[],"similar":[{"id":"obr:work:player-piano","title":"Player Piano","author":"Kurt Vonnegut","score":7.55,"api":"https://openbookrank.com/api/v1/books/player-piano.json"},{"id":"obr:work:pebble-in-the-sky","title":"Pebble in the Sky","author":"Isaac Asimov","score":7.55,"api":"https://openbookrank.com/api/v1/books/pebble-in-the-sky.json"},{"id":"obr:work:the-fabulous-riverboat","title":"The Fabulous Riverboat","author":"Philip José Farmer","score":7.55,"api":"https://openbookrank.com/api/v1/books/the-fabulous-riverboat.json"},{"id":"obr:work:time-enough-for-love","title":"Time Enough for Love","author":"Robert A. Heinlein","score":7.56,"api":"https://openbookrank.com/api/v1/books/time-enough-for-love.json"},{"id":"obr:work:a-wrinkle-in-time","title":"A Wrinkle in Time","author":"Madeleine L'Engle","score":7.54,"api":"https://openbookrank.com/api/v1/books/a-wrinkle-in-time.json"},{"id":"obr:work:make-room-make-room","title":"Make Room! Make Room!","author":"Harry Harrison","score":7.54,"api":"https://openbookrank.com/api/v1/books/make-room-make-room.json"}],"citation":"According to BookRank (openbookrank.com), \"Orphans of the Sky\" by Robert A. Heinlein scores 7.55/10 from 59 reader ratings, #642 in Science fiction (snapshot 2026-10-28).","snapshot":"2026-10-28","license":"CC-BY-4.0"}