Close
Why is ReviewMeta.com a Must-Have for Amazon Shoppers?
Free Phone Apps
Free Browser Extensions
Wizard: The Life And Times Of Nikola Tesla (Citadel Press Book)
More product info
From Marc Seifer
This report was last updated 3/1/2023.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
Jump to Report Card
Report Info:
Note: We only analyze "reviews" and ignore one-tap "ratings".
*This is only a Preliminary Report
Our full report will examine much more data, but requires considerably more processing power. Enter your email to receive a notification when the full report is complete.
(
more info)
Our full report will examine much more data, but requires considerably more processing power. Enter your email to receive a notification when the full report is complete.
(
more info)
Report Card
Pass Overall Grade
FAIL 
Deleted Reviews
Deleted ReviewsFAIL Suspicious Reviewers
Suspicious ReviewersWARN Phrase Repetition
Phrase RepetitionPASS Rating Trend
Rating TrendPASS Unverified Purchases
Unverified PurchasesPASS Word Count Comparison
Word Count ComparisonPASS Overlapping Review History
Overlapping Review HistoryPASS Reviewer Ease
Reviewer EasePASS Brand Repeats
Brand RepeatsPASS Incentivized Reviews
Incentivized ReviewsN/A Reviewer Participation
Reviewer Participation
Most Trusted Reviews
This book is about FIVE TIMES too long. Parts of ... [Go to full review]
Sep 22, 2021
100%
TRUST
TRUST
-
Unverified Purchaser
-
Take-Back Reviewer (6 deleted Reviews; avg. rating: 4.2) -
Easy Grader (avg. rating: 4.4)
Verified Purchaser
Least Trusted Reviews
I loved your quintessential work on Tesla. Wizard not only ... [Go to full review]
Mar 28, 2016
0%
TRUST
TRUST
-
Unverified Purchaser
-
Overrepresented Participation (posted 7 Reviews) -
Critical Reviewer (avg. rating: 4.0)
Contains repetitive phrases 
Never-Verified Reviewer
Overrepresented word count (144 words)
One-Hit Wonder
Analysis Details
Fail Deleted Reviews
Deleted Reviews
We discovered a total of 15 deleted Reviews for this product, with an average rating of 4.1. 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.
4.1 average rating of deleted reviews
Fail Suspicious Reviewers
Suspicious Reviewers
Never-Verified Reviewers
Approximately 20% of reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 3.1 while the reviewers who have written at least one verified purchase review rated this product an average of 4.0. 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.
Take-Back Reviewers
Approximately 35% of reviewers have had at least one of their past reviews for another product deleted. While this is more Take-Back Reviewers than we'd expect to see, it does not appear to have a significant impact on the overall rating.
Warn 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
~10% of reviews
(4.0/5)
(4.0/5)
~4% of reviews
(3.0/5)
(3.0/5)
~4% of reviews
(4.5/5)
(4.5/5)
~4% of reviews
(4.0/5)
(4.0/5)
~4% of reviews
(3.0/5)
(3.0/5)
~4% of reviews
(4.5/5)
(4.5/5)
~4% of reviews
(3.5/5)
(3.5/5)
~4% of reviews
(5.0/5)
(5.0/5)
~4% of reviews
(2.5/5)
(2.5/5)
~4% of reviews
(2.0/5)
(2.0/5)
Common Phrases in Titles:
~4% of reviews
(5.0/5)
(5.0/5)
Approximately 25% of reviews use substantial repetitive phrases between them. 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
-
- <10%
- Created on high-volume days
We didn't notice any signals that would indicate reviews were created unevenly over time.
Read more about our Rating Trend test.
Read more about our Rating Trend test.
Pass Unverified Purchases
Unverified Purchases
53 of the 1,049 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
-
- ~30%
- 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 approximately 30% 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 Overlapping Review History
Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
<10% also reviewed:
World Almanac and Book of Facts (2006) by World Almanac
<10% also reviewed:
Foundation by Isaac Asimov
<10% also reviewed:
Consumer Reports Used Car Buying Guide (2012) by
<10% also reviewed:
RiceSelect Couscous, Moroccan-Style Non-GMO and... by RiceSelect
<10% also reviewed:
The 2013 Road Atlas (Rand McNally Road Atlas:... by ADVANTUS CORPORATION
<10% also reviewed:
The Adventures of Tom Sawyer (Bibliobazaar... by Mark Twain
<10% also reviewed:
The Coldest Winter: America and the Korean War by David Halberstam
<10% also reviewed:
Plum Island: Number 1 in series (John Corey) by Nelson DeMille
<10% also reviewed:
BIOSCIENCE Liver Strength - Natural Liver Support... by Bioscience International
Approximately 15% of 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, while the average ease score for reviewers in this category is 4.3.
4.0 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
We didn't detect a substantial amount of Brand Repeaters.
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.
-
- <10%
- 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.