KDP categories · Top KDP authors
Reference (Law Practice, Books): Amazon KDP category data
Amazon Books Best Sellers data for Reference (Law Practice, Books), updated Nov 3, 2026: median price $21.28, median 68 reviews, average rating 4.7 and a KDPTop opportunity score of 32/100 (highly competitive).
| Price range (middle 50%) | $13.75 – $31 |
|---|---|
| Average rating | 4.7 |
| New releases (90 days) | 2% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Only 2% of its best sellers are under 90 days old, fewer than in 93% of Books categories: established titles hold the list.
- The same niche in Kindle eBooks scores 19, 13 points lower than here.
- Prices spread wide: the middle half runs from $13.75 to $31, so budget editions and premium or boxed sets sell side by side.
Top 10 Reference best sellers
-
Robert's Rules of Order Newly Revised, 12th edition
- List rank#1
- Price$12.50
- Rating4.8
- Reviews6,311
-
Robert's Rules of Order Newly Revised In Brief, 3rd edition
- List rank#2
- Price$7.99
- Rating4.7
- Reviews4,760
-
Legal Terminology: QuickStudy Laminated Reference Guide (Quick Study: Law)
- List rank#3
- Price$8.95
- Rating4.7
- Reviews1,522
-
Legal Writing in Plain English, Third Edition: A Text with Exercises (Chicago Guides to Writing, Editing, and Publishing)
- List rank#4
- Price$19.36
- Rating4.7
- Reviews914
-
Federal Rules of Evidence; 2026 Edition: With Internal Cross-References (Quick Desk Reference)
by Michigan Legal Publishing Ltd.
- List rank#5
- Price$9.99
- Rating4.7
- Reviews23
-
Merriam-Webster's Dictionary of Law, Newest Edition, Trade Paperback
- List rank#6
- Price$10.99
- Rating4.7
- Reviews1,905
-
A Theory of Justice
by John Bordley Rawls
- List rank#7
- Price$40
- Rating4.7
- Reviews486
-
Critical Race Theory: The Key Writings That Formed the Movement
by Kimberle Crenshaw
- List rank#8
- Price$13.20
- Rating4.7
- Reviews1,052
-
Civil Procedure: QuickStudy Laminated Reference Guide
- List rank#9
- Price$7.41
- Rating4.6
- Reviews514
-
Little Book of Restorative Justice: Revised and Updated (Justice and Peacebuilding)
by Howard Zehr
- List rank#10
- Price$6.81
- Rating4.6
- Reviews590
Same niche in Kindle eBooks: Reference
FAQ
Is Reference a good niche for Amazon KDP?
Its KDPTop opportunity score is 32/100, which makes it highly competitive. The median best seller has 68 reviews and sells for $21.28.
How many reviews do you need to rank in Reference?
The median best seller has 68 reviews, and 55% of them have fewer than 100.
What do Reference best sellers cost?
The median price is $21.28; half of the best sellers are priced between $13.75 and $31.
Can new books break into Reference?
2% 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.