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The Mystery of Cloomber
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From Sir Arthur Conan Doyle
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Report Info:
Last Updated: Mar 6, 2018
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Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Warn Overall Grade
FAIL 
Suspicious Reviewers
Suspicious ReviewersWARN Unverified Purchases
Unverified PurchasesWARN Brand Repeats
Brand RepeatsWARN Overlapping Review History
Overlapping Review HistoryPASS Rating Trend
Rating TrendPASS Word Count Comparison
Word Count ComparisonPASS Phrase Repetition
Phrase RepetitionPASS Reviewer Participation
Reviewer ParticipationPASS Reviewer Ease
Reviewer EasePASS Incentivized Reviews
Incentivized ReviewsPASS Deleted Reviews
Deleted Reviews
Most Trusted Reviews
We couldn't find any quality reviews
Least Trusted Reviews
Sir Arthur Conan Doyle's second published novel (after the first ... [Go to full review]
Sep 21, 2012 1 of 1 found this helpful.
30%
TRUST
TRUST
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Unverified Purchaser
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Take-Back Reviewer (181 deleted Reviews; avg. rating: 4.7) -
Brand Repeater (5 of 3014 reviews for this brand; avg rating: 4.8) -
Overlapping Review History: reviewed 9 of 9 top products -
Easy Grader (avg. rating: 4.6)
Critical Reviewer (avg. rating: 3.7)
Analysis Details
Fail Suspicious Reviewers
Suspicious Reviewers
Take-Back Reviewers
1 of the 2 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.
Warn Unverified Purchases
Unverified Purchases
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- 100%
- Unverified Purchases
2 of the 2 total reviews for this product are unverified purchases. This is an excessively large percentage of unverified purchases and it may indicate unnatural reviews.
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.
Warn Brand Repeats
Brand Repeats
Brand Repeaters
1 of the 2 reviewers have reviewed other products for this brand. While this is more Brand Repeaters than we'd expect to see, it does not appear to have a significant impact on the overall rating.
Warn Overlapping Review History
Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
4,400% also reviewed:
Anne of Avonlea (Illustrated) by L. M. Montgomery
750% also reviewed:
Mansfield Park (Vintage Classics) by Austen, Jane/ Vickery, Amanda (INT)
600% also reviewed:
A History Of The Peninsular War: September 1809... by Paddy Griffith
400% also reviewed:
Emily's Quest: A Virago Modern Classic (Emily... by Montgomery, L. M.
350% also reviewed:
Force 10 from Navarone by Sterling
300% also reviewed:
Kilmeny of the Orchard by L. M. Montgomery
250% also reviewed:
Emily of New Moon: A Virago Modern Classic (Emily... by Montgomery, L. M.
250% also reviewed:
The Coming Fury by Catton, Bruce published by... by Pocket
250% also reviewed:
Rose in Bloom by Louisa May Alcott
1 of the 2 reviewers have substantial overlapping product review history. While this is more than we'd expect to see, it does not appear to have a significant impact on the overall rating.
Pass Rating Trend
Rating Trend
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- 0%
- Created on high-volume days
We counted 2 reviews for this product over the span of 1,502 days, an average of 0.0 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 1 or fewer reviews on any given day. We didn't find any days exceeding this threshold.
Read more about our Rating Trend test.
Read more about our Rating Trend test.
Pass Word Count Comparison
Word Count Comparison
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- 0%
- Have an overrepresented word count
We didn't find any review word count groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Word Count Comparison test.
Read more about our Word Count Comparison test.
Pass Phrase Repetition
Phrase Repetition
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- 0%
- Used substantial repetitive phrases
0 of the 2 total reviews for this product use substantial repetitive phrases between them. 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 Phrase Repetition test.
Read more about our Phrase Repetition test.
Pass Reviewer Participation
Reviewer Participation
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- 0%
- From reviewers with an overrepresented participation
We didn't find any participation groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Reviewer Participation test.
Read more about our Reviewer Participation test.
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 4.1, while the average ease score for reviewers in this category is 4.2.
4.1 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.
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.
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- 0%
- Admitted to receiving an incentive
We didn't detect any reviews that used language indicating they were incentivized.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
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.