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Martha MacCallum: Amazon KDP author data
As of Nov 6, 2026, Martha MacCallum has 5 books on Amazon, 5 of them on a best-seller list in the last 30 days (best rank #1), mostly in Essays, Veterans, Japan.
| Median price | $10.79 |
|---|---|
| Price range (middle 50%) | $10.25 – $17.99 |
| Median reviews | 3,689 |
| Total reviews | 11,066 |
| New listings (30 days, incl. new editions) | 2 |
| Breakout books (30 days) | 2 |
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 $10.79, 19% below the median of their main category, Essays.
Martha MacCallum's best-ranked books
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Unknown Valor: A Story of Family, Courage, and Sacrifice from Pearl Harbor to Iwo Jima
by Martha MacCallum
- Price$10.25
- Rating4.7
- Reviews3,689
-
The Book of Valor: America's Story of Survival, Gallantry & Grace
by Martha MacCallum
- Price$35
- Reviews-
- Published2026-11
-
Unknown Valor: A Story of Family, Courage, and Sacrifice from Pearl Harbor to Iwo Jima – The Uncommon Valor of Marines in the Brutal Pacific Theater of World War II
by Martha MacCallum
- Price$10.79
- Rating4.7
- Reviews3,689
-
The Book of Valor: America's Story of Survival, Gallantry & Grace
by Martha MacCallum
- Price$17.99
- Reviews-
-
Unknown Valor: A Story of Family, Courage, and Sacrifice from Pearl Harbor to Iwo Jima
by Martha MacCallum
- Price$6.47
- Rating4.7
- Reviews3,688
- Published2020-02
Main categories
FAQ
How many books does Martha MacCallum have on Amazon?
KDPTop tracks 5 of their books; 5 made an Amazon list in the last 30 days.
Which categories does Martha MacCallum publish in?
Their books chart most often in Essays, Veterans, Japan.
How does Martha MacCallum price their books?
The median price is $10.79; half of the books cost $10.25–$17.99.
Has Martha MacCallum released new books recently?
2 new books in the last 30 days, 2 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.