{"id":"obr:work:once-upon-a-demons-heart","slug":"once-upon-a-demons-heart","url":"https://openbookrank.com/en/book/once-upon-a-demons-heart","urls":{"en":"https://openbookrank.com/en/book/once-upon-a-demons-heart"},"title":"Once Upon a Demon's Heart","titles":{"en":"Once Upon a Demon's Heart"},"author":{"id":"obr:author:k-m-moronova","name":"K.M. Moronova","api":"https://openbookrank.com/api/v1/authors/k-m-moronova.json"},"year":2025,"pages":null,"originalLanguage":null,"identifiers":{"wikidata":null,"openLibrary":"OL45732518W","isbn13":"9781464279010","isbns":["9781464279010","9798347025084"],"isbnByLanguage":{"en":"9781464279010"},"googleBooks":null,"hardcover":"once-upon-a-demons-heart","amazon":null},"score":{"value":7.87,"scale":10,"ratings":24,"confidence":0.115,"rawAverage":6.75,"method":"bayesian-weighted-average","priorWeight":184,"minRatings":50,"methodology":"https://openbookrank.com/en/methodology"},"sources":[{"id":"hardcover","name":"Hardcover","average":6.75,"ratings":24,"weight":1}],"ranks":[],"popularity":{"ratingsPercentile":64,"wikipediaPageviews":0,"editions":0},"series":null,"awards":[],"adaptations":[],"similar":[],"citation":"According to BookRank (openbookrank.com), \"Once Upon a Demon's Heart\" by K.M. Moronova scores 7.87/10 from 24 reader ratings (snapshot 2026-09-21).","snapshot":"2026-09-21","license":"CC-BY-4.0"}