KDP categories · Top KDP authors
Study Aids & Revision Guides (Portuguese, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Study Aids & Revision Guides (Portuguese, Kindle eBooks), updated Nov 3, 2026: median price $5.87, median 1 reviews, average rating 4.4 and a KDPTop opportunity score of 22/100 (highly competitive).
| Price range (middle 50%) | $3.99 – $8.25 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 33% |
| 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.
- Its review barrier is lower than in 98% of Kindle eBooks categories: the median best seller has only 1 reviews, so new books can chart with few.
- 33% of its best sellers came out in the last 90 days, more than in 96% of Kindle eBooks categories: readers here keep buying new titles.
Top 10 Study Aids & Revision Guides best sellers
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Tudo bem? Vamos aprender Português!: Portuguese - Essential Grammar, Vocabulary & Conversation for Beginner and Intermediate Learners (Portuguese Edition)
by Natália Hickman
- List rank#1
- Price$9.99
- Rating4.6
- Reviews146
-
101 Easy Portuguese Conversations: Simple Portuguese Dialogues with Questions for Beginners (Learn Portuguese Through English) (Portuguese Edition)
by Jackie Bolen
- List rank#2
- Price$2.99
- Rating4.2
- Reviews11
-
Read Brazilian Portuguese Without Guessing — Level B1.1 / Ler português do Brasil sem adivinhar: Marcos Alça Voo: No Guessing. No Dictionary. Just ... sem adivinhar Livro 5) (Portuguese Edition)
by Kaya Srilas
- List rank#3
- Price$6.99
- 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#4
- Price$3.99
- Rating5.0
- Reviews1
-
Otimize seu aprendizado: 94 dicas práticas para aprender mais rápido e fixar o conhecimento (Portuguese Edition)
by Daniel T. Willingham
- List rank#5
- Price$7.55
- Rating4.7
- Reviews349
-
A Queda de Albert Camus (Análise do livro): Análise completa e resumo pormenorizado do trabalho (Portuguese Edition)
by Johanna Biehler
- List rank#6
- Price$9.99
- Rating4.5
- Reviews2
-
ESTERILIZAÇÃO MINIMAMENTE INVASIVA EM CÃES E GATOS: Técnic Figueira do treinamento à prática de alto volume (Portuguese Edition)
by Walter Figueira
- List rank#7
- Price$12.90
- Rating5.0
- Reviews1
-
SEQUENCIAMENTO DE DNA: FUNDAMENTOS E QUESTÕES COMENTADAS: Conceitos essenciais e questões comentadas para estudantes e concurseiros (Biotechnology Livro 2) (Portuguese Edition)
by Paulo Roberto Martins Queiroz
- List rank#8
- Price$5.50
- Reviews-
-
ORDO SALUTIS: SOTERIOLOGIA (Portuguese Edition)
by Pr. João Carlos S. Brito
- List rank#9
- Price$0.99
- Rating5.0
- Reviews6
-
Manual de jornalismo (Portuguese Edition)
by Aldo Schmitz
- List rank#10
- Price$9.97
- Rating4.9
- Reviews23
FAQ
Is Study Aids & Revision Guides a good niche for Amazon KDP?
Its KDPTop opportunity score is 22/100, which makes it highly competitive. The median best seller has 1 reviews and sells for $5.87.
How many reviews do you need to rank in Study Aids & Revision Guides?
The median best seller has 1 reviews, and 95% of them have fewer than 100.
What do Study Aids & Revision Guides best sellers cost?
The median price is $5.87; half of the best sellers are priced between $3.99 and $8.25.
Can new books break into Study Aids & Revision Guides?
33% 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.