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JJ Tavernier: Amazon KDP author data
As of Nov 6, 2026, JJ Tavernier has 2 books on Amazon, 2 of them on a best-seller list in the last 30 days (best rank #5), mostly in Design & Architecture, Software Design, Testing & Engineering, Software Development.
| Median price | $35.09 |
|---|---|
| Price range (middle 50%) | $34.64 – $35.54 |
| Median reviews | 4 |
| Total reviews | 8 |
| New listings (30 days, incl. new editions) | 2 |
| Breakout books (30 days) | 2 |
What stands out
- Median price $35.09, 26% below the median of their main category, Design & Architecture.
JJ Tavernier's best-ranked books
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The Principal Engineer Handbook: Define the vision, establish the culture, and execute for outsized impact as a principal engineer
by JJ Tavernier
- Price$34.19
- Rating4.7
- Reviews4
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The Principal Engineer Handbook: Define the vision, establish the culture, and execute for outsized impact as a principal engineer
by JJ Tavernier
- Price$35.99
- Rating4.7
- Reviews4
- Published2026-09
Main categories
FAQ
How many books does JJ Tavernier have on Amazon?
KDPTop tracks 2 of their books; 2 made an Amazon list in the last 30 days.
Which categories does JJ Tavernier publish in?
Their books chart most often in Design & Architecture, Software Design, Testing & Engineering, Software Development.
How does JJ Tavernier price their books?
The median price is $35.09; half of the books cost $34.64–$35.54.
Has JJ Tavernier released new books recently?
2 new books in the last 30 days, 2 of which reached a Best Sellers list.
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.