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Heavy Machinery (Health, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Heavy Machinery (Health, Kindle eBooks), updated Nov 2, 2026: median price $4.99, median 17 reviews, average rating 4.4 and a KDPTop opportunity score of 21/100 (highly competitive).
| Price range (middle 50%) | $2.99 – $9.42 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 4% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 13% of the parent category Health (133), one of the easier corners under it.
- At $4.99 its median price is below 91% of Kindle eBooks categories, so it is a volume game.
- Only 4% of its best sellers are under 90 days old, fewer than in 82% of Kindle eBooks categories: established titles hold the list.
Top 10 Heavy Machinery best sellers
-
Trucks (National Geographic Kids Readers, Level 1)
by Wil Mara
- List rank#1
- Price$4.99
- Rating4.7
- Reviews458
-
Trains (National Geographic Kids Readers, Level 1)
by Amy Shields
- List rank#2
- Price$4.99
- Rating4.6
- Reviews1,215
-
Is This Your Truck?: The Big, Bigger and Biggest Truck Book for Children Ages 4-8 (Fun, Silly and Easy to Read Storybooks for Children Learning to Read Beginner Books)
by Wordplay Groundhog
- List rank#3
- Price$2.99
- Rating4.1
- Reviews128
-
Robots (National Geographic Kids Readers, Level 3)
- List rank#4
- Price$3.99
- Rating4.8
- Reviews1,530
-
Military Ships (Military Machines)
by Barbara Alpert
- List rank#5
- Price$10.99
- Rating5.0
- Reviews2
-
Tow Trucks (Big Machines at Work)
by Cynthia Amoroso
- List rank#6
- Price$15.64
- Rating5.0
- Reviews1
-
Awesome Engineering Activities for Kids: 50+ Exciting STEAM Projects to Design and Build (Awesome STEAM Activities for Kids)
by Christina Schul
- List rank#7
- Price$8.99
- Rating4.7
- Reviews8,010
-
Who Was Henry Ford? (Who Was?)
- List rank#8
- Price$2.99
- Rating4.8
- Reviews1,165
-
Trains (Big Machines at Work)
by Hal Rogers
- List rank#9
- Price$15.64
- Rating3.8
- Reviews5
-
Garbage Trucks (Big Machines at Work)
by Marv Alinas
- List rank#10
- Price$15.64
- Rating4.2
- Reviews3
Same niche in Books: Heavy Machinery
FAQ
Is Heavy Machinery a good niche for Amazon KDP?
Its KDPTop opportunity score is 21/100, which makes it highly competitive. The median best seller has 17 reviews and sells for $4.99.
How many reviews do you need to rank in Heavy Machinery?
The median best seller has 17 reviews, and 73% of them have fewer than 100.
What do Heavy Machinery best sellers cost?
The median price is $4.99; half of the best sellers are priced between $2.99 and $9.42.
Can new books break into Heavy Machinery?
4% 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.