KDP categories · Top KDP authors
Knowledge flow: Amazon KDP author data
As of Nov 6, 2026, Knowledge flow has 28 books on Amazon, 26 of them on a best-seller list in the last 30 days (best rank #7), mostly in Chemical, Organic, Optics.
| Median price | $2.99 |
|---|---|
| Price range (middle 50%) | $2.99 – $3.99 |
| Median reviews | 20 |
| Total reviews | 1,396 |
| New books (30 days) | 0 |
| Breakout books (30 days) | 0 |
What stands out
- 93% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $2.99, 91% below the median of their main category, Chemical.
Knowledge flow's best-ranked books
-
Nanotechnology and Nanoscience: by Knowledge flow (Engineering Core Series)
by Knowledge flow
- Price$2.99
- Rating3.5
- Reviews19
- Published2016-08
-
Engineering Chemistry (Engineering Core Series)
by Knowledge flow
- Price$9.99
- Rating4.3
- Reviews20
-
Basics of Microbiology: by Knowledge flow (Medical Sciences Series)
by Knowledge flow
- Price$2.99
- Rating4.2
- Reviews58
-
Basics of Chemistry (Science Foundation Series)
by Knowledge flow
- Price$2.99
- Rating4.2
- Reviews33
-
Engineering Thermodynamics: by Knowledge flow (Engineering Core Series)
by Knowledge flow
- Price$1.99
- Rating4.1
- Reviews69
-
Basics of Physics (Science Foundation Series)
by Knowledge flow
- Price$17.99
- Rating3.6
- Reviews170
- Published2025-09
-
Digital Electronics: by Knowledge flow (Engineering Core Series)
by Knowledge flow
- Price$2.99
- Rating3.6
- Reviews8
-
Automation and Robotics: by Knowledge flow (Engineering Core Series)
by Knowledge flow
- Price$2.99
- Rating3.9
- Reviews18
-
Basics of Physics (Science Foundation Series)
by Knowledge flow
- Price$9.99
- Rating3.6
- Reviews170
-
Learning PHP and MySQL: by Knowledge flow
by Knowledge flow
- Price$3.99
- Rating4.0
- Reviews3
Main categories
FAQ
How many books does Knowledge flow have on Amazon?
KDPTop tracks 28 of their books; 26 made an Amazon list in the last 30 days.
Which categories does Knowledge flow publish in?
Their books chart most often in Chemical, Organic, Optics.
How does Knowledge flow price their books?
The median price is $2.99; half of the books cost $2.99–$3.99.
Has Knowledge flow released new books recently?
0 new books in the last 30 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.