KDP categories · Top KDP authors
Reference (Mathematics, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Reference (Mathematics, Kindle eBooks), updated Nov 3, 2026: median price $9.00, median 38 reviews, average rating 4.3 and a KDPTop opportunity score of 19/100 (highly competitive).
| Price range (middle 50%) | $3.40 – $13.71 |
|---|---|
| Average rating | 4.3 |
| New releases (90 days) | 10% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 13% of the parent category Mathematics (286), one of the easier corners under it.
- Prices spread wide: the middle half runs from $3.40 to $13.71, so budget editions and premium or boxed sets sell side by side.
Top 10 Reference best sellers
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Statistics 101: From Data Analysis and Predictive Modeling to Measuring Distribution and Determining Probability, Your Essential Guide to Statistics (Adams 101)
by David Borman
- List rank#1
- Price$2.99
- Rating4.4
- Reviews212
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Professor Stewart's Cabinet of Mathematical Curiosities
by Ian Stewart
- List rank#2
- Price$1.99
- Rating4.2
- Reviews172
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The Joy Of X: A Guided Tour of Math, from One to Infinity
- List rank#3
- Price$14.99
- Rating4.5
- Reviews2,677
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Math Hands: Finger Figuring to Turn Your Hands Into a High-Speed Calculator (MemoMathics: Supercharge your learning skills)
by Thomas E Davies
- List rank#4
- Price$2.99
- Rating4.4
- Reviews35
-
The slide rule: A practical manual
by Charles N. Pickworth
- List rank#5
- Price$1.99
- Rating4.1
- Reviews12
-
Math Class Didn’t Show Its Work: Rebuilding Mathematical Confidence from Fractions to Calculus
- List rank#6
- Price$12.99
- Rating4.8
- Reviews20
-
Mathematical Rules of Thumb: A Practical Reference with 400 Shortcuts, Estimates, Formulas, and Sanity Checks for Engineers, Scientists, Programmers, Analysts, and Students
- List rank#7
- Price$12.99
- Rating4.9
- Reviews26
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Mathematical Thinking - For People Who Hate Math: Level Up Your Analytical and Creative Thinking Skills. Excel at Problem-Solving and Decision-Making. (Advanced Thinking Skills Book 1)
- List rank#10
- Price$4.99
- Rating4.1
- Reviews328
Same niche in Books: Reference
FAQ
Is Reference a good niche for Amazon KDP?
Its KDPTop opportunity score is 19/100, which makes it highly competitive. The median best seller has 38 reviews and sells for $9.00.
How many reviews do you need to rank in Reference?
The median best seller has 38 reviews, and 66% of them have fewer than 100.
What do Reference best sellers cost?
The median price is $9.00; half of the best sellers are priced between $3.40 and $13.71.
Can new books break into Reference?
10% 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.