KDP categories · Top KDP authors
Nancy F. Castaldo: Amazon KDP author data
As of Nov 6, 2026, Nancy F. Castaldo has 14 books on Amazon, 12 of them on a best-seller list in the last 30 days (best rank #5), mostly in Botany, Environmental Conservation & Protection, History of Science.
| Median price | $13.62 |
|---|---|
| Price range (middle 50%) | $8.24 – $17.69 |
| Median reviews | 21 |
| Total reviews | 700 |
| New books (30 days) | 0 |
| Breakout books (30 days) | 0 |
What stands out
- 86% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $13.62, 36% above the median of their main category, Botany.
Nancy F. Castaldo's best-ranked books
-
The Story of Seeds: Our food is in crisis. What will you do to protect it? – A Young Reader's Science Guide to Climate Change and Biodiversity
by Nancy F. Castaldo
- Price$14.99
- Rating4.9
- Reviews21
-
Buildings That Breathe: Greening the World's Cities
by Nancy F. Castaldo
- Price$12.21
- Rating5.0
- Reviews2
-
The Farm That Feeds Us: A year in the life of an organic farm
by Nancy F. Castaldo
- Price$14.24
- Rating4.9
- Reviews184
-
The Story of Seeds: Think Global, Act Local
by Nancy F. Castaldo
- Price$2.99
- Rating4.9
- Reviews21
-
The Farm That Feeds Us: A year in the life of an organic farm
by Nancy F. Castaldo
- Price$14.99
- Rating4.9
- Reviews184
- Published2020-07
-
The Story of Seeds: From Mendel's Garden to Your Plate, and How There's More of Less to Eat Around the World
by Nancy F. Castaldo
- Price$22.74
- Rating4.9
- Reviews21
-
Back from the Brink: Saving Animals from Extinction
by Nancy F. Castaldo
- Price$3.99
- Rating4.3
- Reviews17
-
Beastly Brains: Exploring How Animals Think, Talk, and Feel ― A Look at Animal Intelligence, for Kids (Ages 10-12)
by Nancy F. Castaldo
- Price$18.59
- Rating4.7
- Reviews89
-
Beastly Brains: Exploring How Animals Think, Talk, and Feel
by Nancy F. Castaldo
- Price$2.99
- Rating4.7
- Reviews89
-
When the World Runs Dry: Earth's Water in Crisis
by Nancy F. Castaldo
- Price$11.99
- Rating4.4
- Reviews24
Main categories
FAQ
How many books does Nancy F. Castaldo have on Amazon?
KDPTop tracks 14 of their books; 12 made an Amazon list in the last 30 days.
Which categories does Nancy F. Castaldo publish in?
Their books chart most often in Botany, Environmental Conservation & Protection, History of Science.
How does Nancy F. Castaldo price their books?
The median price is $13.62; half of the books cost $8.24–$17.69.
Has Nancy F. Castaldo 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.