KDP categories · Top KDP authors
Unix (Operating Systems, Books): Amazon KDP category data
Amazon Books Best Sellers data for Unix (Operating Systems, Books), updated Nov 2, 2026: median price $33.98, median 86 reviews, average rating 4.5 and a KDPTop opportunity score of 26/100 (highly competitive).
| Price range (middle 50%) | $19.99 – $43.47 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 3% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Only 3% of its best sellers are under 90 days old, fewer than in 88% of Books categories: established titles hold the list.
- At $33.98 its median price beats 91% of Books categories, leaving more margin per copy.
Top 10 Unix best sellers
-
The Linux Command Line, 3rd Edition: A Complete Introduction
by William Shotts
- List rank#1
- Price$27.94
- Rating4.8
- Reviews71
-
Linux Basics for Hackers, 2nd Edition: Getting Started with Networking, Scripting, and Security in Kali
by OccupyTheWeb
- List rank#2
- Price$20.07
- Rating4.8
- Reviews297
-
How Linux Works, 3rd Edition: What Every Superuser Should Know
by Brian Ward
- List rank#3
- Price$46.59
- Rating4.7
- Reviews826
-
Blank Notebook: Unlined Notebook - Large (8.5 x 11 inches) - 100 Pages - Black Cover
by Beesolah Suleiman
- List rank#4
- Price$3.63
- Rating4.5
- Reviews16
-
Systems Performance (Addison-Wesley Professional Computing Series)
by Brendan Gregg
- List rank#5
- Price$57.41
- Rating4.8
- Reviews353
-
Linux for Beginners: The Complete Survival Guide to Commands, Terminal, and System Administration
by Zayen Kairo
- List rank#6
- Price$0.99
- Rating4.8
- Reviews52
-
UNIX: A History and a Memoir
- List rank#7
- Price$18.95
- Rating4.7
- Reviews792
-
The Linux Programming Interface: A Linux and UNIX System Programming Handbook
by Michael Kerrisk
- List rank#8
- Price$99.99
- Rating4.8
- Reviews790
-
Red Hat RHCSA 10 Cert Guide: EX200
by Sander van Vugt
- List rank#9
- Price$54.98
- Rating3.9
- Reviews8
-
Linux: The Comprehensive Guide to Mastering Linux—From Installation to Security, Virtualization, and System Administration Across All Major Distributions (Rheinwerk Computing)
by Michael Kofler
- List rank#10
- Price$41.31
- Rating4.8
- Reviews74
Subcategories
- Administration25
- DNS & Bind24
- Shell24
- AIX21
Same niche in Kindle eBooks: Unix
FAQ
Is Unix a good niche for Amazon KDP?
Its KDPTop opportunity score is 26/100, which makes it highly competitive. The median best seller has 86 reviews and sells for $33.98.
How many reviews do you need to rank in Unix?
The median best seller has 86 reviews, and 51% of them have fewer than 100.
What do Unix best sellers cost?
The median price is $33.98; half of the best sellers are priced between $19.99 and $43.47.
Can new books break into Unix?
3% 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.