The Mystery of Cloomber
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From Sir Arthur Conan Doyle
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Most Trusted Reviews
We couldn't find any quality reviews
Least Trusted Reviews
TRUST
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Unverified Purchaser
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Take-Back Reviewer (186 deleted Reviews; avg. rating: 4.7)
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Brand Repeater (5 of 3037 reviews for this brand; avg rating: 4.8)
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Overlapping Review History: reviewed 9 of 9 top products
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Easy Grader (avg. rating: 4.6)
Analysis Details

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.

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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.

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.

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
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.

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- 0%
- Created on high-volume days
Read more about our Rating Trend test.

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- 0%
- Have an overrepresented word count
Read more about our Word Count Comparison test.

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- 0%
- Used substantial repetitive phrases
Read more about our Phrase Repetition test.

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- 0%
- From reviewers with an overrepresented participation
Read more about our Reviewer Participation test.

4.1 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.

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- 0%
- Admitted to receiving an incentive
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.

- 0
- Reviews have been deleted
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.