KDP categories · Top KDP authors
Ruy Castro: Amazon KDP author data
As of Nov 6, 2026, Ruy Castro has 12 books on Amazon, 12 of them on a best-seller list in the last 30 days (best rank #2), mostly in History, Biographies, Diaries & True Accounts, Brazil.
| Median price | $6.15 |
|---|---|
| Price range (middle 50%) | $4.99 – $9.09 |
| Median reviews | 302 |
| Total reviews | 5,729 |
| New books (30 days) | 1 |
| 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.
Ruy Castro's best-ranked books
-
Trincheira tropical: A Segunda Guerra Mundial no Rio - Vencedor Jabuti 2026 (Portuguese Edition)
by Ruy Castro
- Price$4.99
- Rating4.8
- Reviews934
-
Os perigos do imperador: Um romance do Segundo Reinado – Vencedor Jabuti 2023 (Portuguese Edition)
by Ruy Castro
- Price$6.15
- Rating4.6
- Reviews933
-
Bossa Nova: La historia y las historias (Noema nº 48) (Spanish Edition)
by Ruy Castro
- Price$12.43
- Rating4.6
- Reviews30
-
Ela é carioca (Nova edição): Uma enciclopédia de Ipanema (Portuguese Edition)
by Ruy Castro
- Price$4.99
- Rating4.7
- Reviews160
-
-
Rio de Janeiro: A City on Fire (Writer and the City)
by Ruy Castro
- Price$10.49
- Rating4.1
- Reviews12
-
Os Garotos do Brasil: Um Passeio pela Alma dos Craques (Portuguese Edition)
by Ruy Castro
- Price$2.99
- Rating4.5
- Reviews109
-
Eu gosto de música: Samba, Carnaval, bossa nova e todo aquele jazz (Portuguese Edition)
by Ruy Castro
- Price$5.38
- Rating4.7
- Reviews73
-
Trincheira tropical: A Segunda Guerra Mundial no Rio - Vencedor Jabuti 2026
by Ruy Castro
- Price$9.09
- Rating4.8
- Reviews930
-
O carnaval da guerra e da gripe (Portuguese Edition)
by Ruy Castro
- Price$0
- Rating4.6
- Reviews1,637
- Published2020-03
Main categories
FAQ
How many books does Ruy Castro have on Amazon?
KDPTop tracks 12 of their books; 12 made an Amazon list in the last 30 days.
Which categories does Ruy Castro publish in?
Their books chart most often in History, Biographies, Diaries & True Accounts, Brazil.
How does Ruy Castro price their books?
The median price is $6.15; half of the books cost $4.99–$9.09.
Has Ruy Castro released new books recently?
1 new book 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.