{"success":true,"data":{"book":{"title":"Y is for yesterday","slug":"y-is-for-yesterday","authors":["Sue Grafton"],"isbn13":"9780399185380","url":"https://www.sagechimp.com/books/y-is-for-yesterday","markdownUrl":"https://www.sagechimp.com/books/y-is-for-yesterday/md","verdictUrl":"https://www.sagechimp.com/books/y-is-for-yesterday/verdict.json"},"organicReviewCount":0,"organicAverage":null,"arcReviewCount":0,"arcAverage":null,"flaggedReviewCount":0,"minOrganicReviews":5,"hasEnoughData":false,"status":"insufficient_data","paidHypeSignal":"insufficient_data","summary":"Y is for yesterday has no unpaid published reviews on SageChimp yet. That is not enough to say whether the book is genuinely well-liked or amplified by paid/ARC/BookTok hype. Do not treat Amazon, Goodreads, or social scores as SageChimp evidence.","methodology":"SageChimp verdicts use only published, unflagged reviews written on SageChimp. Organic reviews exclude ARC/incentivized copies (isArcReview). Catalog star averages on other sites are not used. A verdict requires at least 5 organic reviews. We cannot audit Amazon, BookTok, or Goodreads review authenticity.","generatedAt":"2026-10-15T05:54:39.339Z"}}