KDP categories · Top KDP authors
Number Systems (Mathematics, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Number Systems (Mathematics, Kindle eBooks), updated Nov 2, 2026: median price $5.99, median 2 reviews, average rating 4.1 and a KDPTop opportunity score of 26/100 (highly competitive).
| Price range (middle 50%) | $2.99 – $10.00 |
|---|---|
| Average rating | 4.1 |
| New releases (90 days) | 12% |
| Books on the list | 99 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 1% of the parent category Mathematics (286), one of the easier corners under it.
- Its review barrier is lower than in 95% of Kindle eBooks categories: the median best seller has only 2 reviews, so new books can chart with few.
- Prices spread wide: the middle half runs from $2.99 to $10.00, so budget editions and premium or boxed sets sell side by side.
Top 10 Number Systems best sellers
-
The Ultimate Numerology Book: The Complete Guide to the Spiritual Meaning of Numbers including How Your Birthday and Name Affect Your Life Path
by Delphina Woods
- List rank#1
- Price$4.99
- Rating4.6
- Reviews485
-
Number in Scripture: Its Supernatural Design and Spiritual
by E.W. Bullinger
- List rank#2
- Price$0.99
- Rating4.4
- Reviews18
-
Math Tricks: Fast Math Made Easy
by R J Clarke
- List rank#3
- Price$3.99
- Rating3.9
- Reviews71
-
Secrets of the Riemann Zeta Function: Prime Numbers, Infinity, and the Greatest Mystery in Mathematics
by AMULYA SHARMA
- List rank#4
- Price$5
- Rating3.5
- Reviews2
-
Numerical Linear Algebra and Matrix Factorizations (Texts in Computational Science and Engineering Book 22)
by Tom Lyche
- List rank#5
- Price$36.61
- Rating5.0
- Reviews2
-
The World of Numbers ( Rational & Irrational Numbers): π + e, π * e, π/e, Euler-Mascheroni Constant, √2 (root 2), Liouville's constant
by Sudip Sharma
- List rank#6
- Price$2.99
- Rating2.0
- Reviews1
-
THE GOLDEN RATIO: The Secret Behind Beauty, Nature & Genius
by PAUL MAMPILLY
- List rank#7
- Price$2.99
- Reviews-
-
ZERO to INFINITY: The Convergence (The Geometry of Our Existence Book 1)
by Doug Collins
- List rank#8
- Price$3.99
- Reviews-
-
MATH SHORTCUT TRICK: Mastering Math’s Shortcuts Trick: Quick Formulas for Success (Basic to Advance)
by Shahane Alam
- List rank#9
- Price$2.99
- Rating5.0
- Reviews1
-
The Fibonacci Sequence Explained: Spirals in Nature, Sunflowers, Pinecones, Hurricanes, Seashells, and Classical Architecture Revealed Through ... (Half Hour Help Math All Around Us Series)
- List rank#10
- Price$2.99
- Rating5.0
- Reviews1
Same niche in Books: Number Systems
FAQ
Is Number Systems a good niche for Amazon KDP?
Its KDPTop opportunity score is 26/100, which makes it highly competitive. The median best seller has 2 reviews and sells for $5.99.
How many reviews do you need to rank in Number Systems?
The median best seller has 2 reviews, and 96% of them have fewer than 100.
What do Number Systems best sellers cost?
The median price is $5.99; half of the best sellers are priced between $2.99 and $10.00.
Can new books break into Number Systems?
12% 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.