{"id":"obr:work:21st-birthday","slug":"21st-birthday","url":"https://openbookrank.com/en/book/21st-birthday","urls":{"en":"https://openbookrank.com/en/book/21st-birthday"},"title":"21st Birthday","titles":{"en":"21st Birthday","de":"Der 21. Geburtstag","fr":"21e anniversaire"},"author":{"id":"obr:author:james-patterson","name":"James Patterson","api":"https://openbookrank.com/api/v1/authors/james-patterson.json"},"year":2021,"pages":null,"originalLanguage":null,"identifiers":{"wikidata":null,"openLibrary":"OL24161953W","isbn13":null,"isbns":[],"isbnByLanguage":{},"googleBooks":null,"hardcover":"21st-birthday-2021","amazon":null},"score":{"value":null,"scale":10,"ratings":15,"confidence":null,"rawAverage":null,"method":"bayesian-weighted-average","priorWeight":147,"minRatings":50,"methodology":"https://openbookrank.com/en/methodology"},"sources":[{"id":"hardcover","name":"Hardcover","average":6.73,"ratings":15}],"ranks":[],"popularity":{"ratingsPercentile":54,"wikipediaPageviews":0,"editions":14},"series":null,"awards":[],"adaptations":[],"similar":[],"citation":"BookRank (openbookrank.com) lists \"21st Birthday\" by James Patterson but does not score it: it has fewer than 50 reader ratings (snapshot 2026-10-28).","snapshot":"2026-10-28","license":"CC-BY-4.0"}