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Unix (APIs & Operating Environments, Books): Amazon KDP category data
Amazon Books Best Sellers data for Unix (APIs & Operating Environments, Books), updated Nov 2, 2026: median price $40.48, median 6 reviews, average rating 4.3 and a KDPTop opportunity score of 22/100 (highly competitive).
| Price range (middle 50%) | $22.36 – $62.05 |
|---|---|
| Average rating | 4.3 |
| New releases (90 days) | 1% |
| Books on the list | 99 |
| Store | Books |
What stands out
- Its median reviews are 17% of the parent category APIs & Operating Environments (36), one of the easier corners under it.
- Only 1% of its best sellers are under 90 days old, fewer than in 94% of Books categories: established titles hold the list.
- At $40.48 its median price beats 94% of Books categories, leaving more margin per copy.
Top 10 Unix best sellers
-
The Linux Programming Interface: A Linux and UNIX System Programming Handbook
by Michael Kerrisk
- List rank#1
- Price$99.99
- Rating4.8
- Reviews790
-
Learning the bash Shell: Unix Shell Programming (In a Nutshell (O'Reilly))
by Cameron Newham
- List rank#2
- Price$20.06
- Rating4.5
- Reviews320
-
The Art of UNIX Programming (The Addison-Wesley Professional Computng Series)
by Eric Raymond
- List rank#3
- Price$44.46
- Rating4.5
- Reviews108
-
The Unix Programming Environment (Prentice-Hall Software Series)
- List rank#4
- Price$58.38
- Rating4.7
- Reviews182
-
Linux Mint 22.3 Cinnamon "Zena" Mastery: Advanced User Guide to Customization, System Optimization, Troubleshooting, and Power Features in Cinnamon 6.6 (Book 2). (The Linux Forge Collection)
by Eric F. Trail
- List rank#5
- Price$19.99
- Reviews-
-
Advanced Programming in the UNIX Environment, 3rd Edition
by W. Stevens
- List rank#6
- Price$70.25
- Rating4.7
- Reviews267
-
Unix System V: Programmer's Guide
by AT & T
- List rank#7
- Price-
- Reviews-
-
Learning the UNIX Operating System, Fifth Edition
by Jerry Peek
- List rank#8
- Price$14.40
- Rating4.3
- Reviews100
-
Unix Network Programming: The Sockets Networking Api (1) (Addison-Wesley Professional Computing Series)
by W. Richard Stevens
- List rank#9
- Price$76.76
- Rating4.6
- Reviews97
-
Unix System V System Calls: Programmer's Rapid Reference
by Baird Peterson
- List rank#10
- Price-
- Reviews-
FAQ
Is Unix a good niche for Amazon KDP?
Its KDPTop opportunity score is 22/100, which makes it highly competitive. The median best seller has 6 reviews and sells for $40.48.
How many reviews do you need to rank in Unix?
The median best seller has 6 reviews, and 92% of them have fewer than 100.
What do Unix best sellers cost?
The median price is $40.48; half of the best sellers are priced between $22.36 and $62.05.
Can new books break into Unix?
1% 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.