{"id":"obr:work:the-treason-of-isengard","slug":"the-treason-of-isengard","url":"https://openbookrank.com/pl/ksiazka/the-treason-of-isengard","urls":{"pl":"https://openbookrank.com/pl/ksiazka/the-treason-of-isengard","es":"https://openbookrank.com/es/libro/the-treason-of-isengard"},"title":"The Treason of Isengard","titles":{"es":"La traición de Isengard","en":"The Treason of Isengard","pl":"The Treason of Isengard"},"author":{"id":"obr:author:j-r-r-tolkien","name":"J. R. R. Tolkien","api":"https://openbookrank.com/api/v1/authors/j-r-r-tolkien.json"},"year":null,"pages":504,"originalLanguage":"en","identifiers":{"wikidata":"Q502724","openLibrary":"OL27478W","isbn13":"9788445071564","isbns":["9788445071564"],"isbnByLanguage":{"es":"9788445071564"},"googleBooks":null,"hardcover":"the-treason-of-isengard-with-the-history-of-the-lord-of-the-rings-part-two-by-christopher-tolkien","amazon":null},"score":{"value":null,"scale":10,"ratings":0,"confidence":null,"rawAverage":null,"method":"bayesian-weighted-average","priorWeight":147,"minRatings":50,"methodology":"https://openbookrank.com/en/methodology"},"sources":[],"ranks":[],"popularity":{"ratingsPercentile":0,"wikipediaPageviews":1655,"editions":13},"series":{"id":"obr:series:the-history-of-middle-earth","slug":"the-history-of-middle-earth","title":"The History of Middle-earth","position":7,"volumes":12,"api":"https://openbookrank.com/api/v1/series/the-history-of-middle-earth.json"},"awards":[],"adaptations":[],"similar":[],"citation":"BookRank (openbookrank.com) lists \"The Treason of Isengard\" by J. R. R. Tolkien 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"}