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Raph Koster: Amazon KDP author data
As of Nov 6, 2026, Raph Koster has 3 books on Amazon, 3 of them on a best-seller list in the last 30 days (best rank #3), mostly in User Experience & Usability, Game Programming, Game Design.
| Median price | $25.11 |
|---|---|
| Price range (middle 50%) | $24.48 – $30.05 |
| Median reviews | 722 |
| Total reviews | 1,472 |
| New books (30 days) | 0 |
| Breakout books (30 days) | 0 |
Raph Koster's best-ranked books
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Theory of Fun for Game Design
by Raph Koster
- Price$25.11
- Rating4.3
- Reviews722
- Published2013-12
-
Theory of Fun for Game Design
by Raph Koster
- Price$23.85
- Rating4.3
- Reviews722
- Published2013-11
-
Postmortems: Selected Essays Volume One
by Raph Koster
- Price$34.99
- Rating4.5
- Reviews28
Main categories
FAQ
How many books does Raph Koster have on Amazon?
KDPTop tracks 3 of their books; 3 made an Amazon list in the last 30 days.
Which categories does Raph Koster publish in?
Their books chart most often in User Experience & Usability, Game Programming, Game Design.
How does Raph Koster price their books?
The median price is $25.11; half of the books cost $24.48–$30.05.
Has Raph Koster 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.