KDP categories · Top KDP authors
Unix (Operating Systems, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Unix (Operating Systems, Kindle eBooks), updated Nov 2, 2026: median price $8.99, median 28 reviews, average rating 4.4 and a KDPTop opportunity score of 24/100 (highly competitive).
| Price range (middle 50%) | $4.99 – $29.24 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 15% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 5.6× those of the parent category Operating Systems, harder to enter than the parent as a whole.
- 15% of its best sellers came out in the last 90 days, more than in 76% of Kindle eBooks categories: readers here keep buying new titles.
- Prices spread wide: the middle half runs from $4.99 to $29.24, so budget editions and premium or boxed sets sell side by side.
Top 10 Unix best sellers
-
Linux for Beginners: The Complete Survival Guide to Commands, Terminal, and System Administration
by Zayen Kairo
- List rank#1
- Price$0.99
- Rating4.8
- Reviews52
-
Linux for Absolute Beginners: An Introduction to the Linux Operating System, Including Commands, Editors, and Shell Programming
by Andrew Warner
- List rank#2
- Price$4.99
- Rating4.2
- Reviews131
-
The Linux Command Line, 3rd Edition: A Complete Introduction
by William Shotts
- List rank#3
- Price$34.99
- Rating4.8
- Reviews71
-
Linux: The Quick and Easy Beginners Guide to Learning the Linux Command Line (Linux in 3 Days Book 1)
by Jason Cannon
- List rank#4
- Price$0.99
- Rating4.3
- Reviews271
-
Ubuntu 26.04 LTS: A Comprehensive Guide for Beginners and Advanced Users (The Modern Linux Mastery Series)
- List rank#5
- Price$7.77
- Rating4.3
- Reviews26
-
Basics Of Linux Operating System: A Complete Beginners Guide From Installing To Operating As A Master
by Raya Quinn
- List rank#6
- Price$4.99
- Rating2.0
- Reviews1
-
Learn PowerShell in a Month of Lunches, Fourth Edition: Covers Windows, Linux, and macOS
by Travis Plunk
- List rank#7
- Price$40.99
- Rating4.6
- Reviews323
-
How Linux Works, 3rd Edition: What Every Superuser Should Know
by Brian Ward
- List rank#8
- Price$34.99
- Rating4.7
- Reviews826
-
Linux Mint Cinnamon Edition: A Complete Guide for Beginners and Advanced Users (The Modern Linux Mastery Series)
- List rank#9
- Price$7.77
- Rating4.0
- Reviews115
-
UNIX: A History and a Memoir
- List rank#10
- Price$9.95
- Rating4.7
- Reviews792
Same niche in Books: Unix
FAQ
Is Unix a good niche for Amazon KDP?
Its KDPTop opportunity score is 24/100, which makes it highly competitive. The median best seller has 28 reviews and sells for $8.99.
How many reviews do you need to rank in Unix?
The median best seller has 28 reviews, and 76% of them have fewer than 100.
What do Unix best sellers cost?
The median price is $8.99; half of the best sellers are priced between $4.99 and $29.24.
Can new books break into Unix?
15% 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.