KDP categories · Top KDP authors
Reference (Transportation, Books): Amazon KDP category data
Amazon Books Best Sellers data for Reference (Transportation, Books), updated Nov 3, 2026: median price $25.91, median 1 reviews, average rating 4.5 and a KDPTop opportunity score of 31/100 (highly competitive).
| Price range (middle 50%) | $15.99 – $35.66 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 42% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 0% of the parent category Transportation (1,031), one of the easier corners under it.
- Its review barrier is lower than in 99% of Books categories: the median best seller has only 1 reviews, so new books can chart with few.
- 42% of its best sellers came out in the last 90 days, more than in 99% of Books categories: readers here keep buying new titles.
Top 10 Reference best sellers
-
CDL Study Guide 2025-2026: Your All-in-One Course, 2000+ Practice Questions + Online Platform + Full-Length Exams for All Classes + Proven Strategies
by Learnik Press
- List rank#1
- Price$14.63
- Rating4.6
- Reviews185
-
Vehicle Maintenance Log Book
by GE Condit
- List rank#2
- Price$7.99
- Rating4.7
- Reviews88
-
Found It! Monster Trucks: A Fun Search & Find Book for Kids Ages 3-6
- List rank#3
- Price$13.44
- Rating4.7
- Reviews13
-
SUBARU OUTBACK & FORESTER 2013–2025 DIY REPAIR & SERVICE MANUAL: The Complete Step-by-Step Guide to Maintenance, Diagnostics, Troubleshooting, ... Suspension, and Essential Workshop Procedures
by Rose Ife Mary
- List rank#4
- Price$15.16
- Rating5.0
- Reviews2
-
JO 7110.65 Air Traffic Control: (FAA ATC/ATO Handbook)
by U.S. Department of Transportation
- List rank#5
- Price$29.99
- Rating4.6
- Reviews39
-
Airline Transport Pilot Oral Exam Guide: Essential preparation for the FAA checkride (Oral Exam Guide Series)
by Jason Blair
- List rank#6
- Price$19.93
- Reviews-
-
Farmall Cub Encyclopedia
by Kenneth Updike
- List rank#7
- Price$28
- Rating4.7
- Reviews240
-
TOYOTA 4RUNNER 2010-2024 DIY SERVICE AND REPAIR MANUAL: Step-by-Step Maintenance, Diagnostics, Troubleshooting, Engine, Brakes, Suspension, 4WD, Electrical Systems, Towing, Off-Road Care & Ownership
by Axel Hampton
- List rank#8
- Price$35.79
- Rating4.0
- Reviews9
-
Instrument Rating Oral Exam Guide: Essential preparation for the FAA checkride (Oral Exam Guide Series)
by Jason Blair
- List rank#9
- Price$19.95
- Reviews-
-
PE Civil Transportation Exam Prep: The Most Complete Study Guide with Practice Problems, Detailed Solutions, In-Depth Reviews & Full Exams to Get Ready in No Time and Pass with Confidence
by Learnova
- List rank#10
- Price$53.32
- Rating4.0
- Reviews42
Same niche in Kindle eBooks: Reference
FAQ
Is Reference a good niche for Amazon KDP?
Its KDPTop opportunity score is 31/100, which makes it highly competitive. The median best seller has 1 reviews and sells for $25.91.
How many reviews do you need to rank in Reference?
The median best seller has 1 reviews, and 94% of them have fewer than 100.
What do Reference best sellers cost?
The median price is $25.91; half of the best sellers are priced between $15.99 and $35.66.
Can new books break into Reference?
42% 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.