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Julian Barbour: Amazon KDP author data
As of Nov 6, 2026, Julian Barbour has 5 books on Amazon, 5 of them on a best-seller list in the last 30 days (best rank #6), mostly in Time, Relativity, Dynamics.
| Median price | $18.59 |
|---|---|
| Price range (middle 50%) | $13.05 – $18.99 |
| Median reviews | 217 |
| Total reviews | 1,209 |
| New listings (30 days, incl. new editions) | 0 |
| Breakout books (30 days) | 0 |
What stands out
- 100% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $18.59, 24% above the median of their main category, Time.
Julian Barbour's best-ranked books
-
The Janus Point: A New Theory of Time
by Julian Barbour
- Price$18.99
- Rating4.2
- Reviews217
-
The Janus Point: A New Theory of Time
by Julian Barbour
- Price$30.50
- Rating4.2
- Reviews217
-
The Janus Point: A New Theory of Time
by Julian Barbour
- Price$18.59
- Rating4.2
- Reviews217
-
The End of Time: The Next Revolution in Physics
by Julian Barbour
- Price$9.99
- Rating4.0
- Reviews279
-
The End of Time: The Next Revolution in Physics
by Julian Barbour
- Price$13.05
- Rating4.0
- Reviews279
- Published2001-11
Main categories
FAQ
How many books does Julian Barbour have on Amazon?
KDPTop tracks 5 of their books; 5 made an Amazon list in the last 30 days.
Which categories does Julian Barbour publish in?
Their books chart most often in Time, Relativity, Dynamics.
How does Julian Barbour price their books?
The median price is $18.59; half of the books cost $13.05–$18.99.
Has Julian Barbour 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.