KDP categories · Top KDP authors
Private Investigators (Mystery, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Private Investigators (Mystery, Kindle eBooks), updated Nov 3, 2026: median price $5.99, median 7,726 reviews, average rating 4.5 and a KDPTop opportunity score of 19/100 (highly competitive).
| Price range (middle 50%) | $4.99 – $9.12 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 17% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its review barrier is higher than in 98% of Kindle eBooks categories: the median best seller has 7,726 reviews, so new books need time to build up.
- 17% of its best sellers came out in the last 90 days, more than in 81% of Kindle eBooks categories: readers here keep buying new titles.
Top 10 Private Investigators best sellers
-
People of Darkness: A Gripping Southwest Mystery Where a Navajo Detective Confronts a Ruthless Assassin (Leaphorn, Chee & Manuelito Book 4)
- List rank#1
- Price$1.99
- Rating4.6
- Reviews5,057
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The Girl in the Lake: A Holmes, Margaret & Poe Mystery
- List rank#3
- Price$14.99
- Rating4.4
- Reviews167
-
Her Father's Lies (Darcy Hunt FBI Mystery Suspense Thriller Book 12)
by Eva Sparks
- List rank#4
- Price$5.99
- Rating4.4
- Reviews20
-
Sacred Ground: A Novel
by Mercedes Lackey
- List rank#5
- Price$1.99
- Rating4.7
- Reviews536
-
Swamp Shoot (Miss Fortune Mysteries Book 31)
by Jana DeLeon
- List rank#6
- Price$7.99
- Rating4.8
- Reviews2,855
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SIGHT LINE: A NEAGLEY THRILLER (Jack Reacher's Special Investigators: NEAGLEY Book 1)
by Dan Ames
- List rank#9
- Price$7.99
- Rating4.3
- Reviews1,370
-
The Good Daughter: A Chilling Psychological Horror Novel of Family Bonds and Haunting Memories
- List rank#10
- Price$10.99
- Rating4.4
- Reviews67,755
Same niche in Books: Private Investigators
FAQ
Is Private Investigators a good niche for Amazon KDP?
Its KDPTop opportunity score is 19/100, which makes it highly competitive. The median best seller has 7,726 reviews and sells for $5.99.
How many reviews do you need to rank in Private Investigators?
The median best seller has 7,726 reviews, and 9% of them have fewer than 100.
What do Private Investigators best sellers cost?
The median price is $5.99; half of the best sellers are priced between $4.99 and $9.12.
Can new books break into Private Investigators?
17% 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.