{"id":"obr:work:alfred-kropp-the-thirteenth-skull","slug":"alfred-kropp-the-thirteenth-skull","url":"https://openbookrank.com/en/book/alfred-kropp-the-thirteenth-skull","urls":{"en":"https://openbookrank.com/en/book/alfred-kropp-the-thirteenth-skull"},"title":"Alfred Kropp: The Thirteenth Skull","titles":{"en":"Alfred Kropp: The Thirteenth Skull"},"author":{"id":"obr:author:rick-yancey","name":"Rick Yancey","api":"https://openbookrank.com/api/v1/authors/rick-yancey.json"},"year":2008,"pages":307,"originalLanguage":null,"identifiers":{"wikidata":"Q4723023","openLibrary":null,"isbn13":null,"isbns":[],"isbnByLanguage":{},"googleBooks":null,"hardcover":null,"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":null,"editions":null},"series":{"id":"obr:series:alfred-kropp-series","slug":"alfred-kropp-series","title":"Alfred Kropp series","position":3,"volumes":3,"api":"https://openbookrank.com/api/v1/series/alfred-kropp-series.json"},"awards":[],"adaptations":[],"similar":[],"citation":"BookRank (openbookrank.com) lists \"Alfred Kropp: The Thirteenth Skull\" by Rick Yancey 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"}