KDP categories · Top KDP authors
Hydraulics (Mechanical, Books): Amazon KDP category data
Amazon Books Best Sellers data for Hydraulics (Mechanical, Books), updated Nov 2, 2026: median price $32.17, median 22 reviews, average rating 4.4 and a KDPTop opportunity score of 32/100 (highly competitive).
| Price range (middle 50%) | $17.44 – $69.77 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 10% |
| Books on the list | 99 |
| Store | Books |
What stands out
- Its median reviews are 7% of the parent category Mechanical (303), one of the easier corners under it.
- At $32.17 its median price beats 90% of Books categories, leaving more margin per copy.
- Its review barrier is lower than in 72% of Books categories: the median best seller has only 22 reviews, so new books can chart with few.
Top 10 Hydraulics best sellers
-
The Science of Hydraulic Suspension
by Richard Coote
- List rank#1
- Price$30.95
- Rating4.8
- Reviews88
-
![HVAC BIBLE [10 in 1] The Ultimate Beginner's Guide: Mastering Residential & Commercial Sys book cover by Mike Ursan](https://images-na.ssl-images-amazon.com/images/I/71EZxEzDE+L._AC_UL300_SR300,200_.jpg)
HVAC BIBLE [10 in 1] The Ultimate Beginner's Guide: Mastering Residential & Commercial Systems, Setup to Advanced Troubleshooting, Practical Maintenance, Energy Efficiency, and Career Insights
by Mike Ursan
- List rank#2
- Price$22.53
- Rating4.1
- Reviews537
-
Mechanical Engineering for Makers: A Hands-on Guide to Designing and Making Physical Things (Make)
by Brian Bunnell
- List rank#3
- Price$17.19
- Rating4.4
- Reviews637
-
Forklift Log Book with Daily Inspection Checklist: Maintenance and Safety Forklift Operator Inspection Checklist Logbook
by Charlie L Press
- List rank#4
- Price$7.92
- Rating4.8
- Reviews90
-
Audel Pumps and Hydraulics
by Rex Miller
- List rank#5
- Price$33.39
- Rating4.6
- Reviews231
-
Gas Pipeline Hydraulics
by Shashi Menon
- List rank#6
- Price$35.97
- Rating4.7
- Reviews12
-
Mechanical Engineering Handbook: For The Engineers
by Navy Feroz
- List rank#7
- Price$2.99
- Rating4.4
- Reviews73
-
How Hydraulics Work For Beginners: A Practical Guide to Hydraulic Systems (Mechanical Systems for Beginners)
by Colin Chenard
- List rank#8
- Price$19.99
- Rating5.0
- Reviews4
-
The Building of the Panama Canal in Historic Photographs
by Ulrich Keller
- List rank#9
- Price$14.93
- Rating4.5
- Reviews172
-
Water System Operations (WSO) Water Distribution, Grades I & II
by R. Scott Summers Garret P. Westerhoff Brian J. Leto Kirk O. Nowack Christopher J. Corwin. Laurel B. Passantino Technical Editor Zaid K. Chowdhury
- List rank#10
- Price$89
- Rating4.6
- Reviews147
Same niche in Kindle eBooks: Hydraulics
FAQ
Is Hydraulics a good niche for Amazon KDP?
Its KDPTop opportunity score is 32/100, which makes it highly competitive. The median best seller has 22 reviews and sells for $32.17.
How many reviews do you need to rank in Hydraulics?
The median best seller has 22 reviews, and 86% of them have fewer than 100.
What do Hydraulics best sellers cost?
The median price is $32.17; half of the best sellers are priced between $17.44 and $69.77.
Can new books break into Hydraulics?
10% 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.