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From Harlan Coben
This report was last updated 7/16/2020.
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.com claims 3,028 Ratings, we counted 3,038 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 United States with authentic reviews:
Report Card
Fail Overall Grade
FAIL 
Suspicious Reviewers
Suspicious ReviewersFAIL Word Count Comparison
Word Count ComparisonFAIL Phrase Repetition
Phrase RepetitionWARN Deleted Reviews
Deleted ReviewsWARN Rating Trend
Rating TrendWARN Brand Repeats
Brand RepeatsWARN Reviewer Ease
Reviewer EaseWARN Reviewer Participation
Reviewer ParticipationPASS Unverified Purchases
Unverified PurchasesPASS Overlapping Review History
Overlapping Review HistoryPASS Incentivized Reviews
Incentivized Reviews
Most Trusted Reviews
The characters meld beautifully into their old and new friendships. ... [Go to full review]
Aug 26, 2019
100%
TRUST
TRUST
-
Unverified Purchaser
-
Easy Grader (avg. rating: 4.5)
Critical Reviewer (avg. rating: 3.4)
Least Trusted Reviews
Another great book by Harlan Coben. It was nice to ... [Go to full review]
Oct 19, 2016
0%
TRUST
TRUST
-
Verified Purchaser -
Created on a high volume day -
Overrepresented word count (22 words) -
Contains repetitive phrases (
show)
-
Take-Back Reviewer (1 deleted Review; avg. rating: 5.0) -
Brand Repeater (2 of 12 reviews for this brand; avg rating: 4.5) -
Overrepresented Participation (posted 12 Reviews) -
Easy Grader (avg. rating: 4.6)
Analysis Details
Fail Suspicious Reviewers
Suspicious Reviewers
Take-Back Reviewers
1,941 of the 3,038 reviewers have had at least one of their past reviews for another product deleted. This is an excessively large percentage of Take-Back Reviewers which may indicate unnatural reviews.
Fail Word Count Comparison
Word Count Comparison
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- 59%
- 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 3 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 1,795 reviews (or 59%) are within an overrepresented word count group. These reviews have rated this product an average of 4.6, while all other reviews have rated this product an average of 4.4. 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:
Show MoreShow Less
90 reviews
(4.7/5)
(4.7/5)
142 reviews
(4.8/5)
(4.8/5)
51 reviews
(5.0/5)
(5.0/5)
107 reviews
(4.6/5)
(4.6/5)
38 reviews
(4.9/5)
(4.9/5)
45 reviews
(4.8/5)
(4.8/5)
67 reviews
(4.6/5)
(4.6/5)
Common Phrases in Titles:
78 reviews
(4.8/5)
(4.8/5)
189 of the 3,038 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 4.5. 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 Deleted Reviews
Deleted Reviews
We discovered a total of 33 deleted Reviews for this product, with an average rating of 4.7. Even though deleted reviews don't affect the average rating, the fact that action was taken to delete reviews raises some red flags about the integrity of the reviews for the product as whole.
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.
4.7 average rating of deleted reviews
Warn Rating Trend
Rating Trend
-
- 62%
- Created over 95 days
We counted 3,038 reviews for this product over the span of 1,395 days, an average of 2.2 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 8 or fewer reviews on any given day.
However, we see the following 95 days exceeding this threshold:In total, we found that 1,882 reviews were created on just 95 days. This is an excessively high number of reviews submitted on these high volume days.
Warn Brand Repeats
Brand Repeats
Brand Repeaters
830 of the 3,038 reviewers have reviewed other products for this brand. While this is more Brand Repeaters than we'd expect to see, the discrepancy in ratings between the Brand Repeaters and non-repeaters isn't significant enough to rule out the possibility of it being due to random chance.
Warn 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 4.3, while the average ease score for reviewers in this category is 4.2. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.
4.3 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.
Warn Reviewer Participation
Reviewer Participation
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- 55%
- 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 1659 reviewers (or 55%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Unverified Purchases
Unverified Purchases
675 of the 3,038 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 Overlapping Review History
Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
8% also reviewed:
Missing You by Dutton Adult
7% also reviewed:
The Wrong Side of Goodbye: Harry Bosch, Book 19 by Michael Connelly
6% also reviewed:
The Last Mile (Memory Man series) by David Baldacci
6% also reviewed:
The Late Show (Renee Ballard Series Book 1) by Michael Connelly
6% also reviewed:
Night School: A Jack Reacher Novel by Lee Child
5% also reviewed:
Memory Man by David Baldacci
5% also reviewed:
Chapter Seven: Lost Boys by Alex Zakrzewski
5% also reviewed:
Make Me: A Jack Reacher Novel by Child, Lee
4% also reviewed:
Gray Mountain: A Novel by John Grisham
899 of the 3,038 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 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.
5 of the 3,038 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.