KDP categories · Top KDP authors
Upton Sinclair: Amazon KDP author data
As of Nov 6, 2026, Upton Sinclair has 133 books on Amazon, 28 of them on a best-seller list in the last 30 days (best rank #5), mostly in Labor & Industrial Relations, Classics, Labor Policy.
| Median price | $2.74 |
|---|---|
| Price range (middle 50%) | $0.99 – $9.99 |
| Median reviews | 28 |
| Total reviews | 49,276 |
| New books (30 days) | 7 |
| Breakout books (30 days) | 1 |
What stands out
- Median price $2.74, 73% below the median of their main category, Labor & Industrial Relations.
- 7 new books in the last 30 days, 1 of them broke into a Best Sellers list.
Upton Sinclair's best-ranked books
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OIL: Upton Sinclair’s Uncensored 1927 Original Edition, An American Collector’s Classic
by Upton Sinclair
- Price$15.97
- Rating4.6
- Reviews3
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The Flivver King: A Story of Ford America
by Upton Sinclair
- Price$9.95
- Rating4.3
- Reviews253
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The Jungle (Annotated): The 1906 Uncensored Kindle Version - Upton Sinclair
by Upton Sinclair
- Price$0.99
- Rating4.1
- Reviews37
- Published2020-11
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The Brass Check: A Study of American Journalism
by Upton Sinclair
- Price$0.49
- Reviews-
- Published2023-08
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The Jungle | The 1906 Uncensored Version
by Upton Sinclair
- Price$11.99
- Rating4.2
- Reviews611
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The Jungle by Upton Sinclair (Level A1/A1+): Simplified English Story About Hard Work, Poverty, Social Injustice, and the Struggle for Survival
by Upton Sinclair
- Price$2.99
- Reviews-
Main categories
FAQ
How many books does Upton Sinclair have on Amazon?
KDPTop tracks 133 of their books; 28 made an Amazon list in the last 30 days.
Which categories does Upton Sinclair publish in?
Their books chart most often in Labor & Industrial Relations, Classics, Labor Policy.
How does Upton Sinclair price their books?
The median price is $2.74; half of the books cost $0.99–$9.99.
Has Upton Sinclair released new books recently?
7 new books in the last 30 days, 1 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.