KDP categories · Top KDP authors
J.R. Mathews: Amazon KDP author data
As of Nov 6, 2026, J.R. Mathews has 15 books on Amazon, 11 of them on a best-seller list in the last 30 days (best rank #7), mostly in Alternate History, Alternative History, Military.
| Median price | $6.99 |
|---|---|
| Price range (middle 50%) | $5.99 – $26.84 |
| Median reviews | 2,633 |
| Total reviews | 38,314 |
| New listings (30 days, incl. new editions) | 2 |
| Breakout books (30 days) | 2 |
What stands out
- 73% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
J.R. Mathews's best-ranked books
-
Portal to Nova Roma: Empire
by J.R. Mathews
- Price$32.95
- Rating4.8
- Reviews704
-
Portal to Nova Roma: Omnibus, Books 1-3
by J.R. Mathews
- Price$28.83
- Rating4.8
- Reviews58
-
Jake's Magical Market
by J.R. Mathews
- Price$25.99
- Rating4.7
- Reviews6,988
- Published2021-11
-
Portal to Nova Roma: Paris
by J.R. Mathews
- Price$32.95
- Rating4.8
- Reviews900
-
Portal to Nova Roma
by J.R. Mathews
- Price$2.99
- Rating4.7
- Reviews5,653
- Published2022-03
-
Portal to Nova Roma: Empire
by J.R. Mathews
- Price$6.99
- Rating4.8
- Reviews704
- Published2026-08
-
Portal to Nova Roma: Venice
by J.R. Mathews
- Price$4.99
- Rating4.6
- Reviews3,832
-
Portal to Nova Roma: Paris
by J.R. Mathews
- Price$6.99
- Rating4.8
- Reviews900
-
Portal to Nova Roma: The Rhine
by J.R. Mathews
- Price$5.99
- Rating4.8
- Reviews2,806
-
Jake's Magischer Markt (German Edition)
by J.R. Mathews
- Price$8.53
- Rating4.8
- Reviews295
Main categories
FAQ
How many books does J.R. Mathews have on Amazon?
KDPTop tracks 15 of their books; 11 made an Amazon list in the last 30 days.
Which categories does J.R. Mathews publish in?
Their books chart most often in Alternate History, Alternative History, Military.
How does J.R. Mathews price their books?
The median price is $6.99; half of the books cost $5.99–$26.84.
Has J.R. Mathews 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.