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Hydraulics (Mechanical, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Hydraulics (Mechanical, Kindle eBooks), updated Nov 2, 2026: median price $9.17, median 9 reviews, average rating 4.3 and a KDPTop opportunity score of 23/100 (highly competitive).
| Price range (middle 50%) | $4.99 – $19.31 |
|---|---|
| Average rating | 4.3 |
| New releases (90 days) | 14% |
| Books on the list | 99 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 27% of the parent category Mechanical (34), one of the easier corners under it.
- Its review barrier is lower than in 83% of Kindle eBooks categories: the median best seller has only 9 reviews, so new books can chart with few.
- 14% of its best sellers came out in the last 90 days, more than in 75% of Kindle eBooks categories: readers here keep buying new titles.
Top 10 Hydraulics best sellers
-
The Complete HVAC BIBLE for Beginners: A Step-by-Step Guide to Heating, Ventilation and Air Conditioning Systems - Maintenance and Troubleshooting to Become the HVAC Expert and Slash the Bill
by Alex Winterfield
- List rank#1
- Price$4.99
- Rating3.8
- Reviews205
-
Mechanical Engineering Handbook: For The Engineers
by Navy Feroz
- List rank#2
- Price$2.99
- Rating4.4
- Reviews73
-
Little Forklift Mechanic: Molly and the Pumpkin Patch (The Chicken Pickles Club)
- List rank#3
- Price$3.99
- Rating5.0
- Reviews1
-
Hoover Dam: An American Adventure
by Joseph E. Stevens
- List rank#4
- Price$12.98
- Rating4.6
- Reviews96
-
Hydraulics and Pneumatics: A Technician's and Engineer's Guide
by Andrew Parr
- List rank#5
- Price$39.46
- Rating4.5
- Reviews177
-
Computational Fluid Dynamics: an Overview of Methods
by D. James Benton
- List rank#6
- Price$0.99
- Rating4.5
- Reviews30
-
Mastering Pump Maintenance: A Practical Guide to Centrifugal Pumps, Slurry Pumps, Troubleshooting, Alignment, Sealing Systems, and Preventive Maintenance for Mechanical Engineers and Professionals.
by Pankaj Mishra
- List rank#7
- Price$3.30
- Rating4.0
- Reviews1
-
Learn to repair Espresso coffee machines: Practical guide with essential knowledge
by Rocco Clemente
- List rank#8
- Price$5.99
- Rating3.1
- Reviews4
-
Hydronic Heating Diagnostic & Troubleshooting Handbook: Measurement-First Troubleshooting for Boilers, Circulators, Radiant Heating, Hydronic Controls, Flow, and Heat Pumps
by Torren Valeck
- List rank#9
- Price$12.99
- Reviews-
-
Fundamentals of Industrial Lubrication: A Standards-Aware Practical Guide to Tribology, Lubricant Selection, Application, Sampling, and Oil-Analysis ... ... Especially iron and steel . Book 14)
by Mohamed Hamdy
- List rank#10
- Price$5
- Reviews-
Same niche in Books: Hydraulics
FAQ
Is Hydraulics a good niche for Amazon KDP?
Its KDPTop opportunity score is 23/100, which makes it highly competitive. The median best seller has 9 reviews and sells for $9.17.
How many reviews do you need to rank in Hydraulics?
The median best seller has 9 reviews, and 94% of them have fewer than 100.
What do Hydraulics best sellers cost?
The median price is $9.17; half of the best sellers are priced between $4.99 and $19.31.
Can new books break into Hydraulics?
14% 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.