KDP categories · Top KDP authors
Functional Analysis (Pure Mathematics, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Functional Analysis (Pure Mathematics, Kindle eBooks), updated Nov 2, 2026: median price $19.24, median 6 reviews, average rating 4.5 and a KDPTop opportunity score of 25/100 (highly competitive).
| Price range (middle 50%) | $8.20 – $54.05 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 3% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 6% of the parent category Pure Mathematics (108), one of the easier corners under it.
- At $19.24 its median price beats 99% of Kindle eBooks categories, leaving more margin per copy.
- Only 3% of its best sellers are under 90 days old, fewer than in 88% of Kindle eBooks categories: established titles hold the list.
Top 10 Functional Analysis best sellers
-
Introduction to Calculus and Analysis I (Classics in Mathematics)
by Richard Courant
- List rank#1
- Price$37.48
- Rating4.5
- Reviews59
-
Convex Analysis (Textbooks in Mathematics)
by Steven G. Krantz
- List rank#2
- Price$53.95
- Reviews-
-
Fourier Analysis: An Introduction (Princeton Lectures in Analysis Book 1)
by Elias M. Stein
- List rank#3
- Price$55
- Rating4.6
- Reviews85
-
Theory of Functions, Parts I and II (Dover Books on Mathematics)
by Konrad Knopp
- List rank#4
- Price$9.99
- Rating4.4
- Reviews35
-
Álgebra lineal y geometría (Spanish Edition)
by Manuel Castellet
- List rank#5
- Price$14.41
- Rating4.5
- Reviews43
-
A First Course in Harmonic Analysis (Universitext)
by Anton Deitmar
- List rank#6
- Price$49.99
- Rating3.9
- Reviews4
-
Calculus of Variations (Dover Books on Mathematics)
by I. M. Gelfand
- List rank#7
- Price$8.76
- Rating4.5
- Reviews225
-
Guide To Mathematical Methods For Physicists, A: With Problems And Solutions (Essential Textbooks In Physics Book 0)
by Michela Petrini
- List rank#8
- Price$30.40
- Rating4.6
- Reviews23
-
Integral Transforms and Their Applications
by Lokenath Debnath
- List rank#9
- Price$75.99
- Rating4.3
- Reviews7
-
Paul Lévy and Maurice Fréchet: 50 Years of Correspondence in 107 Letters (Sources and Studies in the History of Mathematics and Physical Sciences)
by Marc Barbut
- List rank#10
- Price$43.44
- Rating3.5
- Reviews2
Same niche in Books: Functional Analysis
FAQ
Is Functional Analysis a good niche for Amazon KDP?
Its KDPTop opportunity score is 25/100, which makes it highly competitive. The median best seller has 6 reviews and sells for $19.24.
How many reviews do you need to rank in Functional Analysis?
The median best seller has 6 reviews, and 95% of them have fewer than 100.
What do Functional Analysis best sellers cost?
The median price is $19.24; half of the best sellers are priced between $8.20 and $54.05.
Can new books break into Functional Analysis?
3% 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.