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The Keeper of Lost Things: winner of the Richard & Judy Readers' Award and Sunday Times...
More product info
From Ruth Hogan
This report was last updated 11/2/2019.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
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Report Info:
Note: While Amazon.co.uk claims 4,494 Ratings, we counted 4,514 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".
Note: We only analyze "reviews" and ignore one-tap "ratings".
Top products in Literature & Fiction with authentic reviews:
Report Card
Fail Overall Grade
FAIL 
Rating Trend
Rating TrendFAIL Phrase Repetition
Phrase RepetitionWARN Reviewer Participation
Reviewer ParticipationPASS Unverified Purchases
Unverified PurchasesPASS Word Count Comparison
Word Count ComparisonPASS Suspicious Reviewers
Suspicious ReviewersPASS Overlapping Review History
Overlapping Review HistoryPASS Reviewer Ease
Reviewer EasePASS Brand Repeats
Brand RepeatsPASS Incentivized Reviews
Incentivized ReviewsPASS Deleted Reviews
Deleted Reviews
Most Trusted Reviews
enjoyed reading this book different [Go to full review]
Mar 27, 2018
100%
TRUST
TRUST
-
Verified Purchaser -
Overrepresented word count (7 words)
-
Easy Grader (avg. rating: 4.7)
Critical Reviewer (avg. rating: 3.8)
Least Trusted Reviews
A really good read, the story had me captured and ... [Go to full review]
Apr 28, 2017
0%
TRUST
TRUST
-
Verified Purchaser
-
Created on a high volume day -
Contains repetitive phrases (
show)
-
Overrepresented Participation (posted 12 Reviews) -
Easy Grader (avg. rating: 4.6)
Analysis Details
Fail Rating Trend
Rating Trend
-
- 35%
- Created over 83 days
We counted 4,514 reviews for this product over the span of 1,098 days, an average of 4.1 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 12 or fewer reviews on any given day.
However, we see the following 83 days exceeding this threshold:In total, we found that 1,587 reviews were created on just 83 days. The reviews on these high volume days have rated this product an average of 4.5 while reviews from other days have rated this product an average of 4.3. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
Fail Phrase Repetition
Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.
Common Phrases in Reviews:
97 reviews
(5.0/5)
(5.0/5)
180 reviews
(4.7/5)
(4.7/5)
83 reviews
(4.7/5)
(4.7/5)
175 of the 4,514 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.8 while reviews without substantial repetitive phrases rated this product an average of 4.3. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
Warn Reviewer Participation
Reviewer Participation
-
- 68%
- From reviewers with an overrepresented participation
We see the following 2 participation groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 3049 reviewers (or 68%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Unverified Purchases
Unverified Purchases
380 of the 4,514 total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.
Pass Word Count Comparison
Word Count Comparison
-
- 25%
- Have an overrepresented word count
In the graph above, we can see the distribution of review word counts for this product and the expected distribution for this category. We see the following 1 group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 1,131 reviews (or 25%) are within an overrepresented word count group. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Suspicious Reviewers
Suspicious Reviewers
One-Hit Wonders
170 of the 4,514 reviewers have only reviewed this product. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Never-Verified Reviewers
115 of the 4,514 reviewers have never written a verified purchase review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Take-Back Reviewers
310 of the 4,514 reviewers have had at least one of their past reviews for another product deleted. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Single-Day Reviewers
47 of the 4,514 reviewers have written multiple reviews but posted all of them on a single day. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Overlapping Review History
Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
8% also reviewed:
Eleanor Oliphant is Completely Fine by Gail Honeyman
4% also reviewed:
The Girl on the Train by Paula Hawkins
3% also reviewed:
Behind Closed Doors: The gripping psychological... by B A Paris
3% also reviewed:
Gone Girl by Gillian Flynn
3% also reviewed:
Me Before You by Jojo Moyes
2% also reviewed:
He Said/She Said: the must-read bestselling... by Erin Kelly
2% also reviewed:
The Tattooist of Auschwitz: the heart-breaking... by Heather Morris
2% also reviewed:
The Husband's Secret by Liane Moriarty
2% also reviewed:
The Girl in the Ice: A gripping serial killer... by Robert Bryndza
875 of the 4,514 reviewers have substantial overlapping product review history. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Reviewer Ease
Reviewer Ease
The ease score is the average rating for all reviews that a given reviewer submits. The average ease score for reviewers of this product is 4.4, while the average ease score for reviewers in this category is 4.3. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.
4.4 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeats
Brand Repeaters
43 of the 4,514 reviewers have reviewed other products for this brand. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Incentivized Reviews
Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
6 of the 4,514 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Pass Deleted Reviews
Deleted Reviews
- 0
- Reviews have been deleted
We have not discovered any deleted reviews for this product.
There are a few limitations to keep in mind regarding the Deleted Reviews test:
There are a few limitations to keep in mind regarding the Deleted Reviews test:
- We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
- We have no information on reviews that were never published in the first place.
- We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.