KDP categories · Top KDP authors
Reference (Portuguese, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Reference (Portuguese, Kindle eBooks), updated Nov 3, 2026: median price $5.90, median 2 reviews, average rating 4.4 and a KDPTop opportunity score of 19/100 (highly competitive).
| Price range (middle 50%) | $5.90 – $9.99 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 1% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 0% of the parent category Portuguese (3,458), one of the easier corners under it.
- Only 1% of its best sellers are under 90 days old, fewer than in 97% of Kindle eBooks categories: established titles hold the list.
- Its review barrier is lower than in 95% of Kindle eBooks categories: the median best seller has only 2 reviews, so new books can chart with few.
Top 10 Reference best sellers
-
101 Easy Portuguese Conversations: Simple Portuguese Dialogues with Questions for Beginners (Learn Portuguese Through English) (Portuguese Edition)
by Jackie Bolen
- List rank#1
- Price$2.99
- Rating4.2
- Reviews11
-
Às Vezes Mudar é Ficar (Portuguese Edition)
by Sofia Castro Fernandes
- List rank#2
- Price$12.99
- Reviews-
-
Master Portuguese Reading Comprehension (Beginner-Intermediate): Portuguese Dialogues & Short Stories with English Translations (Learn Portuguese Through English) (Portuguese Edition)
by Jackie Bolen
- List rank#3
- Price$3.99
- Rating5.0
- Reviews1
-
Dicionário Porto Editora de Inglês-Português para o Brasil / Porto Editora English-Brazilian Portuguese Dictionary (Portuguese Edition)
by Porto Editora
- List rank#4
- Price$11.99
- Rating4.5
- Reviews72
-
Guia de sobrevivência na natureza (Manual do Mundo) (Portuguese Edition)
- List rank#5
- Price$6.15
- Rating4.7
- Reviews2,266
-
Também somos o amor que vai chegar na vida de alguém (Portuguese Edition)
by Iandê Albuquerque
- List rank#6
- Price$6.99
- Rating4.8
- Reviews15
-
Para ler Grande sertão: veredas (Portuguese Edition)
by Ítalo Moriconi
- List rank#7
- Price$5.99
- Rating4.4
- Reviews30
-
A Bíblia Do Cérebro (Portuguese Edition)
by Elton Soares
- List rank#8
- Price$2.99
- Rating4.1
- Reviews81
-
O jogo – A Bíblia da sedução: penetrando na sociedade secreta dos mestres da conquista (Portuguese Edition)
by Neil Strauss
- List rank#9
- Price$12.99
- Rating4.5
- Reviews571
-
Glossário Tupi-Guarani Ilustrado: Incluindo nomes indígenas de pessoas e cidades (Coleção História Viva) (Portuguese Edition)
by Edições LeBooks
- List rank#10
- Price$0.99
- Rating4.2
- Reviews103
FAQ
Is Reference a good niche for Amazon KDP?
Its KDPTop opportunity score is 19/100, which makes it highly competitive. The median best seller has 2 reviews and sells for $5.90.
How many reviews do you need to rank in Reference?
The median best seller has 2 reviews, and 79% of them have fewer than 100.
What do Reference best sellers cost?
The median price is $5.90; half of the best sellers are priced between $5.90 and $9.99.
Can new books break into Reference?
1% of the current best sellers were released in the last 90 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.