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Christopher Ryan: Amazon KDP author data
As of Nov 6, 2026, Christopher Ryan has 7 books on Amazon, 7 of them on a best-seller list in the last 30 days (best rank #2), mostly in Research, Social Philosophy, Natural Resources.
| Median price | $14.99 |
|---|---|
| Price range (middle 50%) | $12.74 – $16.21 |
| Median reviews | 1,464 |
| Total reviews | 19,413 |
| New books (30 days) | 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 $14.99, 40% below the median of their main category, Research.
Christopher Ryan's best-ranked books
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Sex at Dawn: How We Mate, Why We Stray, and What It Means for Modern Relationships
by Christopher Ryan
- Price$18.79
- Rating4.5
- Reviews5,008
-
Sex at Dawn: How We Mate, Why We Stray, and What It Means for Modern Relationships ― A NYT Bestselling Evolutionary Psychology Book (P.S.)
by Christopher Ryan
- Price$10.99
- Rating4.5
- Reviews5,008
- Published2011-07
-
Sex at Dawn: How We Mate, Why We Stray, and What It Means for Modern Relationships
by Christopher Ryan
- Price$14.49
- Rating4.5
- Reviews5,008
-
Civilized To Death: The Price of Progress
by Christopher Ryan
- Price$16.99
- Rating4.6
- Reviews1,464
-
Civilized to Death: The Price of Progress
by Christopher Ryan
- Price$15.43
- Rating4.6
- Reviews1,463
-
Talking Sex (with Christopher Ryan)
by Christopher Ryan
- Price$4.99
- Rating5.0
- Reviews2
-
Civilized to Death: The Price of Progress
by Christopher Ryan
- Price$14.99
- Rating4.6
- Reviews1,460
Main categories
FAQ
How many books does Christopher Ryan have on Amazon?
KDPTop tracks 7 of their books; 7 made an Amazon list in the last 30 days.
Which categories does Christopher Ryan publish in?
Their books chart most often in Research, Social Philosophy, Natural Resources.
How does Christopher Ryan price their books?
The median price is $14.99; half of the books cost $12.74–$16.21.
Has Christopher Ryan 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.