KDP categories · Top KDP authors
Reference (Mathematics, Books): Amazon KDP category data
Amazon Books Best Sellers data for Reference (Mathematics, Books), updated Nov 2, 2026: median price $16.53, median 168 reviews, average rating 4.5 and a KDPTop opportunity score of 28/100 (highly competitive).
| Price range (middle 50%) | $11.05 – $22.93 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 2% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 13% of the parent category Mathematics (1,295), one of the easier corners under it.
- Only 2% of its best sellers are under 90 days old, fewer than in 93% of Books categories: established titles hold the list.
Top 10 Reference best sellers
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SAT Test Prep: The Complete & Up-to-Date Prep Book with Full-Length Practice Tests, Exam-Ready Practice Questions & Step-by-Step Explanations to Ace the Digital SAT
- List rank#1
- Price$13.74
- Rating3.6
- Reviews309
-
Carson Dellosa 54 Division Flash Cards | Flashcards Covering All Facts for Dividing Through 12, Math Games for Kids 8-12, 3rd Grade Mathematics and Up
by Brighter Child
- List rank#2
- Price$2.99
- Rating4.7
- Reviews5,575
-
Geometry Part 2: QuickStudy Laminated Reference Guide (QuickStudy Academic)
by S B Kizlik
- List rank#3
- Price$8.34
- Rating4.7
- Reviews1,036
-
ACT Math Test Prep: a QuickStudy Laminated Reference Guide
by Stephen Reiss
- List rank#4
- Price$7.41
- Rating4.6
- Reviews147
-
Math Games with Bad Drawings: 75 1/4 Simple, Challenging, Go-Anywhere Games―And Why They Matter
by Ben Orlin
- List rank#5
- Price$19.93
- Rating4.8
- Reviews560
-
-
Competition Math: for Middle School
by J. Batterson
- List rank#7
- Price$29.50
- Rating4.5
- Reviews445
-
Math with Bad Drawings: Illuminating the Ideas That Shape Our Reality
by Ben Orlin
- List rank#8
- Price$11.62
- Rating4.6
- Reviews1,054
-
The Cartoon Guide to Geometry: A Humorous Mathematics Study Guide on Plane Geometry and Visual Proofs
by Larry Gonick
- List rank#9
- Price$14.89
- Rating4.6
- Reviews173
-
Catch-Up Math: 6th Grade
by Teacher Created Materials
- List rank#10
- Price$18.99
- Rating4.7
- Reviews106
Same niche in Kindle eBooks: Reference
FAQ
Is Reference a good niche for Amazon KDP?
Its KDPTop opportunity score is 28/100, which makes it highly competitive. The median best seller has 168 reviews and sells for $16.53.
How many reviews do you need to rank in Reference?
The median best seller has 168 reviews, and 35% of them have fewer than 100.
What do Reference best sellers cost?
The median price is $16.53; half of the best sellers are priced between $11.05 and $22.93.
Can new books break into Reference?
2% 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.