KDP categories · Top KDP authors
Unit Operations & Transport Phenomena: Amazon KDP category data
Amazon Books Best Sellers data for Unit Operations & Transport Phenomena, updated Nov 2, 2026: median price $84.59, median 6 reviews, average rating 4.4 and a KDPTop opportunity score of 26/100 (highly competitive).
| Price range (middle 50%) | $42.23 – $158 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 8% |
| Books on the list | 99 |
| Store | Books |
What stands out
- Its median reviews are 11% of the parent category Chemical (57), one of the easier corners under it.
- At $84.59 its median price beats 99% of Books categories, leaving more margin per copy.
- Its review barrier is lower than in 88% of Books categories: the median best seller has only 6 reviews, so new books can chart with few.
Top 10 Unit Operations & Transport Phenomena best sellers
-
Shadow Unit: Ghost Protocol: A Military Science Fiction Special Forces Thriller (Shadow Unit Operations Book 1)
by Daniel Mercer
- List rank#1
- Price$5.99
- Rating4.4
- Reviews26
-
Special Reconnaissance and Advanced Small Unit Patrolling: Tactics, Techniques and Procedures for Special Operations Forces
by Edward Wolcoff
- List rank#2
- Price$26.29
- Rating4.7
- Reviews209
-
Black Sun Rising: Book One: Praetorian Series
by Jeff Emde
- List rank#3
- Price$22.99
- Rating4.8
- Reviews18
-
Handbook of Heat Transfer
by Warren Rohsenow
- List rank#4
- Price$163
- Rating4.2
- Reviews10
-
Problems for Biomedical Fluid Mechanics and Transport Phenomena (Cambridge Texts in Biomedical Engineering)
by Mark Johnson
- List rank#5
- Price$110
- Rating5.0
- Reviews1
-
Industrial Water Desalination and Membrane Plant Engineering: Designing Reverse Osmosis Infrastructure Through Membrane Optimization, Energy Recovery, and Brine Management Systems
by Dorian Havel
- List rank#6
- Price$25.04
- Reviews-
-
Unit Operations of Chemical Engineering (7th edition)(McGraw Hill Chemical Engineering Series)
by Warren McCabe
- List rank#7
- Price$211
- Rating4.5
- Reviews189
-
Transport Phenomena
by R. Byron Bird
- List rank#8
- Price$114
- Rating4.5
- Reviews210
-
Fundamentals of Geomorphology (Routledge Fundamentals of Physical Geography)
by Richard Huggett
- List rank#9
- Price$43.49
- Rating4.5
- Reviews17
-
Thermodynamics DeMYSTiFied
by Merle C. Potter
- List rank#10
- Price$31
- Rating4.7
- Reviews23
FAQ
Is Unit Operations & Transport Phenomena a good niche for Amazon KDP?
Its KDPTop opportunity score is 26/100, which makes it highly competitive. The median best seller has 6 reviews and sells for $84.59.
How many reviews do you need to rank in Unit Operations & Transport Phenomena?
The median best seller has 6 reviews, and 92% of them have fewer than 100.
What do Unit Operations & Transport Phenomena best sellers cost?
The median price is $84.59; half of the best sellers are priced between $42.23 and $158.
Can new books break into Unit Operations & Transport Phenomena?
8% 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.