{"id":"obr:work:the-crystal-cave","slug":"the-crystal-cave","url":"https://openbookrank.com/en/book/the-crystal-cave","urls":{"en":"https://openbookrank.com/en/book/the-crystal-cave","it":"https://openbookrank.com/it/libro/the-crystal-cave","nl":"https://openbookrank.com/nl/boek/the-crystal-cave"},"title":"The Crystal Cave","titles":{"en":"The Crystal Cave","de":"Flammender Kristall","es":"La cueva de cristal","fr":"La grotte de cristal","it":"La grotta di cristallo","pt":"A Caverna de Cristal","nl":"De kristallen grot","sv":"Kristallgrottan"},"author":{"id":"obr:author:mary-stewart","name":"Mary Stewart","api":"https://openbookrank.com/api/v1/authors/mary-stewart.json"},"year":1970,"pages":480,"originalLanguage":"en","identifiers":{"wikidata":"Q2730105","openLibrary":"OL213256W","isbn13":"9780688013981","isbns":["9780688013981"],"isbnByLanguage":{"en":"9780688013981"},"googleBooks":null,"hardcover":"the-crystal-cave","amazon":{"en":"0688013988"}},"score":{"value":7.94,"scale":10,"ratings":108,"confidence":0.424,"rawAverage":7.92,"method":"bayesian-weighted-average","priorWeight":147,"minRatings":50,"methodology":"https://openbookrank.com/en/methodology"},"sources":[{"id":"openlibrary","name":"Open Library","average":8.67,"ratings":9,"weight":0.083},{"id":"hardcover","name":"Hardcover","average":7.85,"ratings":99,"weight":0.917}],"ranks":[{"category":"fantasy","name":"Fantasy","rank":758,"url":"https://openbookrank.com/en/ranking/fantasy","api":"https://openbookrank.com/api/v1/rankings/fantasy.json"}],"popularity":{"ratingsPercentile":78,"wikipediaPageviews":22592,"editions":37},"series":{"id":"obr:series:mary-stewarts-merlin-trilogy","slug":"mary-stewarts-merlin-trilogy","title":"Mary Stewart's Merlin Trilogy","position":null,"volumes":5,"api":"https://openbookrank.com/api/v1/series/mary-stewarts-merlin-trilogy.json"},"awards":["NPR Top 100 Science Fiction and Fantasy Books","Mythopoeic Fantasy Award"],"adaptations":[],"similar":[{"id":"obr:work:the-sword-in-the-stone","title":"The Sword in the Stone","author":"T. H. White","score":7.93,"api":"https://openbookrank.com/api/v1/books/the-sword-in-the-stone.json"},{"id":"obr:work:the-dark-is-rising","title":"The Dark Is Rising","author":"Susan Cooper","score":7.93,"api":"https://openbookrank.com/api/v1/books/the-dark-is-rising.json"},{"id":"obr:work:krabat","title":"Krabat","author":"Otfried Preußler","score":7.93,"api":"https://openbookrank.com/api/v1/books/krabat.json"},{"id":"obr:work:the-lion-the-witch-and-the-wardrobe","title":"The Lion, the Witch, and the Wardrobe","author":"C. S. Lewis","score":7.93,"api":"https://openbookrank.com/api/v1/books/the-lion-the-witch-and-the-wardrobe.json"},{"id":"obr:work:the-last-unicorn","title":"The Last Unicorn","author":"Peter S. Beagle","score":7.92,"api":"https://openbookrank.com/api/v1/books/the-last-unicorn.json"},{"id":"obr:work:the-hollow-hills","title":"The Hollow Hills","author":"Mary Stewart","score":7.97,"api":"https://openbookrank.com/api/v1/books/the-hollow-hills.json"}],"citation":"According to BookRank (openbookrank.com), \"The Crystal Cave\" by Mary Stewart scores 7.94/10 from 108 reader ratings, #758 in Fantasy (snapshot 2026-10-28).","snapshot":"2026-10-28","license":"CC-BY-4.0"}