KDP categories · Top KDP authors
Ella Factfinder: Amazon KDP author data
As of Nov 6, 2026, Ella Factfinder has 7 books on Amazon, 7 of them on a best-seller list in the last 30 days (best rank #4), mostly in Holidays, Education, Experiments, Instruments & Measurement.
| Median price | $6.99 |
|---|---|
| Price range (middle 50%) | $3.99 – $6.99 |
| Median reviews | 126 |
| Total reviews | 1,175 |
| 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 $6.99, 33% above the median of their main category, Holidays.
Ella Factfinder's best-ranked books
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History's Biggest Oops, The Blunders That Changed The World: Diastrous Mistakes, Monumental Failures And The Lessons They Left Behind (The Oops Files)
by Ella Factfinder
- Price$6.99
- Rating4.2
- Reviews403
-
Science's Biggest Oops: 30 Scientific Fails, Blunders, and Bizarre Discoveries That Changed The World (The Oops Files)
by Ella Factfinder
- Price$14.99
- Rating4.4
- Reviews261
-
War's Biggest Oops: The Shocking Military Blunders and Battles That Changed History (The Oops Files)
by Ella Factfinder
- Price$6.99
- Rating4.2
- Reviews118
-
Science's Biggest Oops : 30 Scientific Fails, Blunders, and Bizarre Discoveries That Changed The World (The Oops Files)
by Ella Factfinder
- Price$4.99
- Rating4.4
- Reviews261
-
America's Biggest Oops: 30 Unbelievable Fails and Forgotten Blunders in American History ; Perfect For History Lovers and Curious Minds (The Oops Files)
by Ella Factfinder
- Price$6.99
- Rating4.0
- Reviews126
-
Easter Unveiled : Discover the History, Traditions and Fun Facts of The Holiday (Holiday Facts Series)
by Ella Factfinder
- Price$2.99
- Rating4.0
- Reviews2
-
St. Patrick's Day Uncovered: Uncover The Facts, Myths, and History Behind the Celebration for teens and adults (Holiday Facts Series)
by Ella Factfinder
- Price$2.99
- Rating3.6
- Reviews4
Main categories
FAQ
How many books does Ella Factfinder have on Amazon?
KDPTop tracks 7 of their books; 7 made an Amazon list in the last 30 days.
Which categories does Ella Factfinder publish in?
Their books chart most often in Holidays, Education, Experiments, Instruments & Measurement.
How does Ella Factfinder price their books?
The median price is $6.99; half of the books cost $3.99–$6.99.
Has Ella Factfinder 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.