KDP categories · Top KDP authors
Paul de Kruif: Amazon KDP author data
As of Nov 6, 2026, Paul de Kruif has 8 books on Amazon, 8 of them on a best-seller list in the last 30 days (best rank #9), mostly in Bacteriology, Microbiology, Scientists.
| Median price | $6.23 |
|---|---|
| Price range (middle 50%) | $1.74 – $13.45 |
| Median reviews | 246 |
| Total reviews | 2,052 |
| 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 $6.23, 65% below the median of their main category, Bacteriology.
Paul de Kruif's best-ranked books
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Microbe Hunters: The Classic Book on the Major Discoveries of the Microscopic World
by Paul de Kruif
- Price$1.99
- Rating4.5
- Reviews473
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Microbe Hunters: An International Bestselling Classic of Medical Science, from the Discovery of Microbes to Life-Saving Vaccines
by Paul de Kruif
- Price$10.47
- Rating4.5
- Reviews473
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Cazadores de Microbios, Los (Spanish Edition)
by Paul de Kruif
- Price$12.95
- Rating4.7
- Reviews429
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A Man Against Insanity: The Birth of Drug Therapy in a Northern Michigan Asylum
by Paul de Kruif
- Price$14.95
- Rating4.4
- Reviews18
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Microbe Hunters: Restored Classics to Go Edition
by Paul de Kruif
- Price$1.99
- Rating4.5
- Reviews473
Main categories
FAQ
How many books does Paul de Kruif have on Amazon?
KDPTop tracks 8 of their books; 8 made an Amazon list in the last 30 days.
Which categories does Paul de Kruif publish in?
Their books chart most often in Bacteriology, Microbiology, Scientists.
How does Paul de Kruif price their books?
The median price is $6.23; half of the books cost $1.74–$13.45.
Has Paul de Kruif 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.