KDP categories · Top KDP authors
Customary (Perspectives on Law, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Customary (Perspectives on Law, Kindle eBooks), updated Nov 1, 2026: median price $8.95, median 1 reviews, average rating 4.3 and a KDPTop opportunity score of 19/100 (highly competitive).
| Price range (middle 50%) | $4.00 – $21.99 |
|---|---|
| Average rating | 4.3 |
| New releases (90 days) | 0% |
| Books on the list | 35 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 0% of the parent category Perspectives on Law (243), one of the easier corners under it.
- Only 0% of its best sellers are under 90 days old, fewer than in 99% of Kindle eBooks categories: established titles hold the list.
- Its review barrier is lower than in 98% of Kindle eBooks categories: the median best seller has only 1 reviews, so new books can chart with few.
Top 10 Customary best sellers
-
Twisted Justice (Daniel Pike Legal Thriller Series Book 4)
- List rank#1
- Price$3.99
- Rating4.5
- Reviews2,356
-
SHATTERED JUSTICE (Four Sizzling Thrillers): Solomon vs. Lord, The Deep Blue Alibi, To Speak for the Dead, and Illegal
by Paul Levine
- List rank#2
- Price$5.99
- Rating4.4
- Reviews2,443
-
William Blackstone's Commentaries on the Laws of England: Modernized and Condensed: Book I, II, III, and IV
by William Blackstone
- List rank#3
- Price$5.99
- Rating4.6
- Reviews3
-
Why Honor Matters
by Tamler Sommers
- List rank#4
- Price$1.99
- Rating4.4
- Reviews100
-
Let's Talk About... Non-Monogamy: Questions and Conversation Starters for Couples Exploring Open Relationships, Swinging, or Polyamory (Beyond the Sheets Book 2)
by J.R. James
- List rank#5
- Price$3.99
- Rating3.6
- Reviews105
-
THE CODE OF LEKE DUKAGJINI (Codex Alexandri): CUSTOMARY LAWS OF THE NORTHERN ALBANIAN TRIBES: TRIESHI, HOTI, AND GRUDA
by Dr. Martin Ivanaj
- List rank#6
- Price$9.99
- Reviews-
-
Principles of Law (The Doctrine of Law and State on the Basis of the Christian Worldview Book 2)
by Friedrich Julius Stahl
- List rank#7
- Price$4.99
- Rating4.0
- Reviews1
-
The Recovery of Historical Law: Volume 1B of the Philosophy of Law: The History of Legal Philosophy
by Friedrich Julius Stahl
- List rank#8
- Price$4.99
- Rating5.0
- Reviews2
-
Common Law & Natural Rights
by Ruben Alvarado
- List rank#9
- Price$4.99
- Rating4.5
- Reviews115
-
The Myth of the Cultural Jew: Culture and Law in Jewish Tradition
by Roberta Rosenthal Kwall
- List rank#10
- Price$16.19
- Rating4.4
- Reviews13
FAQ
Is Customary a good niche for Amazon KDP?
Its KDPTop opportunity score is 19/100, which makes it highly competitive. The median best seller has 1 reviews and sells for $8.95.
How many reviews do you need to rank in Customary?
The median best seller has 1 reviews, and 86% of them have fewer than 100.
What do Customary best sellers cost?
The median price is $8.95; half of the best sellers are priced between $4.00 and $21.99.
Can new books break into Customary?
0% 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.