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Testing & Measurement (Counseling & Psychology, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Testing & Measurement (Counseling & Psychology, Kindle eBooks), updated Nov 2, 2026: median price $23.99, median 27 reviews, average rating 4.5 and a KDPTop opportunity score of 30/100 (highly competitive).
| Price range (middle 50%) | $7.99 – $46 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 4% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 0% of the parent category Counseling & Psychology (5,920), one of the easier corners under it.
- At $23.99 its median price beats 99% of Kindle eBooks categories, leaving more margin per copy.
- Only 4% of its best sellers are under 90 days old, fewer than in 82% of Kindle eBooks categories: established titles hold the list.
Top 10 Testing & Measurement best sellers
-
Letters From The Looney Bin (The Looniverse Book 1)
by Thatcher C. Nalley
- List rank#1
- Price$2.99
- Rating4.0
- Reviews3,316
-
I Think I Might Be Autistic: A Guide to Autism Spectrum Disorder Diagnosis and Self-Discovery for Adults
by Cynthia Kim
- List rank#2
- Price$4.99
- Rating4.5
- Reviews2,516
-
The Early Career Therapist: A Practical Guide to Clinical Skills, Case Formulation, Difficult Clients, and Confident Therapy Practice
by Angel Gill
- List rank#3
- Price$4.99
- Rating5.0
- Reviews1
-
Gifts Differing: Understanding Personality Type - The original book behind the Myers-Briggs Type Indicator (MBTI) test
by Isabel Briggs Myers
- List rank#4
- Price-
- Rating4.6
- Reviews1,139
-
The 1976 Psychological Assessment of Ted Bundy (Development of the Violent Mind Book 4)
by Al Carlisle
- List rank#5
- Price$7.99
- Rating4.5
- Reviews779
-
Character and Neurosis: An Integrative View
by Claudio Naranjo
- List rank#6
- Price$19.95
- Rating4.4
- Reviews86
-
Intelligence: All That Matters
by Stuart Ritchie
- List rank#7
- Price$0.99
- Rating4.5
- Reviews312
-
Blue Dreams: The Science and the Story of the Drugs that Changed Our Minds
by Lauren Slater
- List rank#8
- Price$11.99
- Rating4.4
- Reviews176
-
The Mismeasure of Man
by Stephen Jay Gould
- List rank#9
- Price$9.99
- Rating4.6
- Reviews540
-
Is This Autism?: A Companion Guide for Diagnosing
by Donna Henderson
- List rank#10
- Price$30.39
- Rating4.7
- Reviews120
Same niche in Books: Testing & Measurement
FAQ
Is Testing & Measurement a good niche for Amazon KDP?
Its KDPTop opportunity score is 30/100, which makes it highly competitive. The median best seller has 27 reviews and sells for $23.99.
How many reviews do you need to rank in Testing & Measurement?
The median best seller has 27 reviews, and 66% of them have fewer than 100.
What do Testing & Measurement best sellers cost?
The median price is $23.99; half of the best sellers are priced between $7.99 and $46.
Can new books break into Testing & Measurement?
4% of the current best sellers were released in the last 90 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.