KDP categories · Top KDP authors
Daniel J. Barrett: Amazon KDP author data
As of Nov 6, 2026, Daniel J. Barrett has 10 books on Amazon, 9 of them on a best-seller list in the last 30 days (best rank #4), mostly in Programming, Linux, Networking & System Administration.
| Median price | $20.39 |
|---|---|
| Price range (middle 50%) | $15.18 – $28.99 |
| Median reviews | 128 |
| Total reviews | 2,713 |
| New books (30 days) | 0 |
| Breakout books (30 days) | 0 |
What stands out
- 90% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $20.39, 31% below the median of their main category, Programming.
Daniel J. Barrett's best-ranked books
-
Linux Pocket Guide: Essential Commands
by Daniel J. Barrett
- Price$19.75
- Rating4.8
- Reviews134
-
Linux Pocket Guide
by Daniel J. Barrett
- Price$18.76
- Rating4.8
- Reviews134
-
Linux Pocket Guide
by Daniel J. Barrett
- Price$13.99
- Rating4.5
- Reviews121
-
SSH, The Secure Shell: The Definitive Guide
by Daniel J. Barrett
- Price$25.99
- Rating4.6
- Reviews75
-
Efficient Linux at the Command Line: Boost Your Command-Line Skills
by Daniel J. Barrett
- Price$34.70
- Rating4.7
- Reviews109
-
Efficient Linux at the Command Line: Boost Your Command-Line Skills
by Daniel J. Barrett
- Price$32.96
- Rating4.7
- Reviews109
-
Macintosh Terminal Pocket Guide: Take Command of Your Mac
by Daniel J. Barrett
- Price$12.28
- Rating4.5
- Reviews164
-
Linux Pocket Guide: Essential Commands
by Daniel J. Barrett
- Price$21.04
- Rating4.7
- Reviews1,628
-
Macintosh Terminal Pocket Guide: Take Command of Your Mac
by Daniel J. Barrett
- Price$7.99
- Rating4.5
- Reviews164
-
SSH, The Secure Shell: The Definitive Guide
by Daniel J. Barrett
- Price$29.99
- Rating4.6
- Reviews75
- Published2005-06
Main categories
FAQ
How many books does Daniel J. Barrett have on Amazon?
KDPTop tracks 10 of their books; 9 made an Amazon list in the last 30 days.
Which categories does Daniel J. Barrett publish in?
Their books chart most often in Programming, Linux, Networking & System Administration.
How does Daniel J. Barrett price their books?
The median price is $20.39; half of the books cost $15.18–$28.99.
Has Daniel J. Barrett released new books recently?
0 new books in the last 30 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.