KDP categories · Top KDP authors
Reference (Science & Math, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Reference (Science & Math, Kindle eBooks), updated Nov 3, 2026: median price $9.98, median 230 reviews, average rating 4.6 and a KDPTop opportunity score of 28/100 (highly competitive).
| Price range (middle 50%) | $6.62 – $13.58 |
|---|---|
| Average rating | 4.6 |
| New releases (90 days) | 9% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 22% of the parent category Science & Math (1,038), one of the easier corners under it.
Top 10 Reference best sellers
-
The Pleasure of Finding Things Out: The Best Short Works of Richard P. Feynman
- List rank#1
- Price$1.99
- Rating4.6
- Reviews1,017
-
The Demon-Haunted World: Science as a Candle in the Dark
by Carl Sagan
- List rank#2
- Price$7.99
- Rating4.7
- Reviews7,825
-
Scientific American September 2026
- List rank#3
- Price$6.99
- Rating4.8
- Reviews13
-
Scientific American October 2026
- List rank#4
- Price$6.99
- Rating4.2
- Reviews7
-
-
Scientific American June 2026
- List rank#6
- Price$6.99
- Rating4.4
- Reviews42
-
Pogue's Basics: Essential Tips and Shortcuts (That No One Bothers to Tell You)
by David Pogue
- List rank#7
- Price$17.99
- Rating4.5
- Reviews693
-
The Complete Home Apothecary Book: 401 Easy, Step-by-Step Herbal Remedies and Powerful Blends to Relieve Pain, Boost Immunity, Improve Sleep, and Restore Balance Naturally
by Ava Green
- List rank#8
- Price$9.99
- Rating4.3
- Reviews1,219
-
The Essential Prepper's Medical Handbook: The Pocket Sized Survival Guide
by Edwin Hose
- List rank#9
- Price$0.99
- Rating4.2
- Reviews59
-
Scientific American November 2026
- List rank#10
- Price$6.99
- Reviews-
Subcategories
Same niche in Books: 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 230 reviews and sells for $9.98.
How many reviews do you need to rank in Reference?
The median best seller has 230 reviews, and 43% of them have fewer than 100.
What do Reference best sellers cost?
The median price is $9.98; half of the best sellers are priced between $6.62 and $13.58.
Can new books break into Reference?
9% 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.