KDP categories · Top KDP authors
Reference (Engineering, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Reference (Engineering, Kindle eBooks), updated Nov 3, 2026: median price $9.99, median 4 reviews, average rating 4.4 and a KDPTop opportunity score of 26/100 (highly competitive).
| Price range (middle 50%) | $5.25 – $12.99 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 29% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 1% of the parent category Engineering (366), one of the easier corners under it.
- 29% of its best sellers came out in the last 90 days, more than in 94% of Kindle eBooks categories: readers here keep buying new titles.
- Its review barrier is lower than in 91% of Kindle eBooks categories: the median best seller has only 4 reviews, so new books can chart with few.
Top 10 Reference best sellers
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DIY Survival & Off-Grid Projects: 50+ Step-by-step plans to secure your family home & supplies in a blackout or disaster. Master no-grid, self-sufficient living even with minimal hands-on experience
by Travis Lawson
- List rank#2
- Price$4.99
- Rating4.6
- Reviews34
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Amateur Radio for the Antisocial: It’s not all about the ragchew
by Allan Hall
- List rank#3
- Price$7.99
- Rating4.3
- Reviews200
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Introduction to Elementary Particles
by David Griffiths
- List rank#4
- Price$69
- Rating4.7
- Reviews253
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Encyclopedia of Electronic Components Volume 1: Resistors, Capacitors, Inductors, Switches, Encoders, Relays, Transistors
- List rank#5
- Price$13.86
- Rating4.7
- Reviews1,276
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Beginner's Guide to Reading Schematics, Fourth Edition
by Stan Gibilisco
- List rank#6
- Price$14.87
- Rating4.5
- Reviews1,958
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The Safety Moment Playbook: 120 Ready-to-Use Safety Moments for Construction, Industrial and Manufacturing Teams
by Michael Brakefield
- List rank#7
- Price$4.99
- Rating5.0
- Reviews1
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The Manual of Lost Knowledge: A Black Start Guide for Rebuilding Civilization
by James Holloway
- List rank#8
- Price$3.99
- Rating4.7
- Reviews13
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Breverton's Encyclopedia of Inventions: A Compendium of Technological Leaps, Groundbreaking Discoveries and Scientific Breakthroughs that Changed the World
by Terry Breverton
- List rank#9
- Price$3.99
- Rating4.5
- Reviews86
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Construction Estimating : Complete Basic to Advanced Practical Guide (Civil Engineering Practical Guides Book 1)
by Chandan kumar
- List rank#10
- Price$2.99
- Reviews-
Same niche in Books: Reference
FAQ
Is Reference a good niche for Amazon KDP?
Its KDPTop opportunity score is 26/100, which makes it highly competitive. The median best seller has 4 reviews and sells for $9.99.
How many reviews do you need to rank in Reference?
The median best seller has 4 reviews, and 82% of them have fewer than 100.
What do Reference best sellers cost?
The median price is $9.99; half of the best sellers are priced between $5.25 and $12.99.
Can new books break into Reference?
29% 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.