{"id":"obr:work:friday","slug":"friday","url":"https://openbookrank.com/en/book/friday","urls":{"en":"https://openbookrank.com/en/book/friday","es":"https://openbookrank.com/es/libro/friday","fr":"https://openbookrank.com/fr/livre/friday","it":"https://openbookrank.com/it/libro/friday"},"title":"Friday","titles":{"en":"Friday","pl":"Piętaszek","de":"Freitag","es":"Viernes","fr":"Vendredi","it":"Operazione domani","nl":"Friday","uk":"Фрайді","ja":"フライデイ","ko":"프라이데이"},"author":{"id":"obr:author:robert-a-heinlein","name":"Robert A. Heinlein","api":"https://openbookrank.com/api/v1/authors/robert-a-heinlein.json"},"year":1982,"pages":370,"originalLanguage":"en","identifiers":{"wikidata":"Q1641639","openLibrary":"OL59706W","isbn13":null,"isbns":[],"isbnByLanguage":{},"googleBooks":null,"hardcover":"friday","amazon":null},"score":{"value":7.46,"scale":10,"ratings":120,"confidence":0.449,"rawAverage":7.11,"method":"bayesian-weighted-average","priorWeight":147,"minRatings":50,"methodology":"https://openbookrank.com/en/methodology"},"sources":[{"id":"openlibrary","name":"Open Library","average":7.73,"ratings":15,"weight":0.125},{"id":"hardcover","name":"Hardcover","average":7.02,"ratings":105,"weight":0.875}],"ranks":[{"category":"science-fiction","name":"Science fiction","rank":712,"url":"https://openbookrank.com/en/ranking/science-fiction","api":"https://openbookrank.com/api/v1/rankings/science-fiction.json"}],"popularity":{"ratingsPercentile":79,"wikipediaPageviews":27238,"editions":25},"series":null,"awards":[],"adaptations":[],"similar":[{"id":"obr:work:dhalgren","title":"Dhalgren","author":"Samuel R. Delany","score":7.46,"api":"https://openbookrank.com/api/v1/books/dhalgren.json"},{"id":"obr:work:feed","title":"Feed","author":"M. T. Anderson","score":7.46,"api":"https://openbookrank.com/api/v1/books/feed.json"},{"id":"obr:work:the-ringworld-engineers","title":"The Ringworld Engineers","author":"Larry Niven","score":7.46,"api":"https://openbookrank.com/api/v1/books/the-ringworld-engineers.json"},{"id":"obr:work:dune-house-atreides","title":"Dune: House Atreides","author":"Kevin J. Anderson","score":7.46,"api":"https://openbookrank.com/api/v1/books/dune-house-atreides.json"},{"id":"obr:work:heretics-of-dune","title":"Heretics of Dune","author":"Frank Herbert","score":7.47,"api":"https://openbookrank.com/api/v1/books/heretics-of-dune.json"},{"id":"obr:work:the-gunslinger","title":"The Dark Tower: The Gunslinger","author":"Stephen King","score":7.45,"api":"https://openbookrank.com/api/v1/books/the-gunslinger.json"}],"citation":"According to BookRank (openbookrank.com), \"Friday\" by Robert A. Heinlein scores 7.46/10 from 120 reader ratings, #712 in Science fiction (snapshot 2026-10-28).","snapshot":"2026-10-28","license":"CC-BY-4.0"}