KDP categories · Top KDP authors
Study Languages Lab: Amazon KDP author data
As of Nov 6, 2026, Study Languages Lab has 14 books on Amazon, 14 of them on a best-seller list in the last 30 days (best rank #10), mostly in Chinese, Japanese, Language Instruction.
| Median price | $4.25 |
|---|---|
| Price range (middle 50%) | $4 – $5 |
| Median reviews | 1 |
| Total reviews | 2 |
| New books (30 days) | 14 |
| Breakout books (30 days) | 7 |
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 $4.25, 29% below the median of their main category, Chinese.
- 14 new books in the last 30 days, 7 of them broke into a Best Sellers list.
Study Languages Lab's best-ranked books
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KANJI BY RADICALS 1000: Learn 1000 Japanese Kanji Through Meaning Families
by Study Languages Lab
- Price$5
- Rating5.0
- Reviews1
-
Thai Vocabulary 1000: Learn Thai Words Through Meaning Word Formation Pronunciation and Tone
by Study Languages Lab
- Price$5
- Reviews-
- Published2026-09
-
Thai Grammar Patterns 210: An Integrated Learning Path from Beginner to Advanced
by Study Languages Lab
- Price$6.50
- Reviews-
-
JAPANESE KANJI IN CONTEXT 1000: 1000 Practical Lessons on Meaning Reading Choice Context and Nuance for English Speakers
by Study Languages Lab
- Price$5
- Rating5.0
- Reviews1
-
Chinese Characters Beyond Translation 1000: Understand Chinese Through Meaning Sound and Culture
by Study Languages Lab
- Price$4.50
- Reviews-
-
Chinese Character Origins & Structure 500: Understand 500 Simplified Chinese Characters Through Etymology, Components, Sound Clues, and Historical Development
by Study Languages Lab
- Price$4
- Reviews-
-
Chinese Polyphonic Characters 500: Learn How Pronunciation and Meaning Change Across 500 Words
by Study Languages Lab
- Price$4
- Reviews-
-
THE SECRETS OF CHINESE CHARACTERS 500: 500 Questions That Reveal the Hidden Logic of Chinese Characters
by Study Languages Lab
- Price$4
- Reviews-
-
CHINESE WORD CHOICE 500: One English Word, Multiple Chinese Choices 500 Meaning and Usage Differences English Speakers Need to Know
by Study Languages Lab
- Price$4
- Reviews-
-
CHINESE CHARACTERS THAT LOOK ALIKE 500: Master 500 Look-Alike Character Sets Through Shape Meaning and Usage
by Study Languages Lab
- Price$4
- Reviews-
Main categories
FAQ
How many books does Study Languages Lab have on Amazon?
KDPTop tracks 14 of their books; 14 made an Amazon list in the last 30 days.
Which categories does Study Languages Lab publish in?
Their books chart most often in Chinese, Japanese, Language Instruction.
How does Study Languages Lab price their books?
The median price is $4.25; half of the books cost $4–$5.
Has Study Languages Lab released new books recently?
14 new books in the last 30 days, 7 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.