KDP categories · Top KDP authors
Machinery (Mechanical, Books): Amazon KDP category data
Amazon Books Best Sellers data for Machinery (Mechanical, Books), updated Nov 3, 2026: median price $23.90, median 22 reviews, average rating 4.5 and a KDPTop opportunity score of 37/100 (highly competitive).
| Price range (middle 50%) | $14.99 – $42.41 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 20% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 7% of the parent category Mechanical (303), one of the easier corners under it.
- 20% of its best sellers came out in the last 90 days, more than in 90% of Books categories: readers here keep buying new titles.
- At $23.90 its median price beats 82% of Books categories, leaving more margin per copy.
Top 10 Machinery best sellers
-
Basic Machines and How They Work
by Naval Education
- List rank#1
- Price$0.99
- Rating4.5
- Reviews1,055
-
Machinery's Handbook: Toolbox
by Erik Oberg
- List rank#2
- Price$82.21
- Rating4.7
- Reviews293
-
Industrial Electrical Schematics for Beginners: Learn to Read Ladder Diagrams, Motor Control Circuits, Electrical Symbols, Wiring Diagrams, Control Panels, and Real Industrial Drawings with step-by...
- List rank#3
- Price$18.99
- Rating4.2
- Reviews28
-
Fault Finder's Bible: North American Electrical Edition
by Jordan Butler
- List rank#4
- Price$34
- Rating3.6
- Reviews22
-
507 Mechanical Movements
by Henry T. Brown
- List rank#5
- Price$0.99
- Rating4.5
- Reviews1,608
-
Industrial Electricity and Motor Controls: A Field Manual — NEC-Based Wiring, Control Circuits, PLCs, VFDs, and Troubleshooting for Electricians and Maintenance Technicians
- List rank#6
- Price$42.08
- Rating4.4
- Reviews19
-
The Perfectionists: How Precision Engineers Created the Modern World
- List rank#7
- Price$11.98
- Rating4.6
- Reviews2,334
-
Bambu Studio Complete User Guide for Beginners: Why Your Screen Never Matches the Tutorial, What Every Setting Does, and How to Fix Any Failed Print So Your 3D Printer Never Gathers Dust
by Hugo Trent
- List rank#8
- Price$9.99
- Rating4.6
- Reviews26
-
Practical Mechanics For Inventors
by Pedro Portugal
- List rank#9
- Price$21.84
- Rating3.4
- Reviews3
-
Equipment Maintenance Log Book: Daily Preventive Care for Repairs & Service of Machinery, Repairs and Maintenance Record Book - 8.5" x 11" 100+ Pages
by Wendy Brinton
- List rank#10
- Price$9.99
- Rating4.6
- Reviews54
Same niche in Kindle eBooks: Machinery
FAQ
Is Machinery a good niche for Amazon KDP?
Its KDPTop opportunity score is 37/100, which makes it highly competitive. The median best seller has 22 reviews and sells for $23.90.
How many reviews do you need to rank in Machinery?
The median best seller has 22 reviews, and 65% of them have fewer than 100.
What do Machinery best sellers cost?
The median price is $23.90; half of the best sellers are priced between $14.99 and $42.41.
Can new books break into Machinery?
20% 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.