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Naoki Inaba: Amazon KDP author data
As of Nov 6, 2026, Naoki Inaba has 5 books on Amazon, 5 of them on a best-seller list in the last 30 days (best rank #2), mostly in Geometry & Topology, Puzzles, Logic & Brain Teasers.
| Median price | $8.34 |
|---|---|
| Price range (middle 50%) | $6.99 – $14.20 |
| Median reviews | 147 |
| Total reviews | 1,223 |
| New books (30 days) | 0 |
| 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.
- Median price $8.34, 44% below the median of their main category, Geometry & Topology.
Naoki Inaba's best-ranked books
-
The Original Area Mazes: 100 Addictive Puzzles to Solve with Simple Math—and Clever Logic!
by Naoki Inaba
- Price$6.99
- Rating4.7
- Reviews471
-
The Big Puzzle Book of Area Mazes: 300 Mind-Bending Math Puzzles in Five Challenge Levels (Original Area Mazes)
by Naoki Inaba
- Price$14.20
- Rating4.8
- Reviews67
-
The Original Area Mazes: 100 Addictive Puzzles to Solve with Simple Math―and Clever Logic!
by Naoki Inaba
- Price$8.34
- Rating4.7
- Reviews471
-
The Original Area Mazes, Volume 2: 100 More Addictive Puzzles to Solve with Simple Math—and Clever Logic!
by Naoki Inaba
- Price$1.99
- Rating4.8
- Reviews147
-
The Big Puzzle Book of Area Mazes: 300 Mind-Bending Math Puzzles in Five Challenge Levels (Original Area Mazes)
by Naoki Inaba
- Price$14.95
- Rating4.8
- Reviews67
Main categories
FAQ
How many books does Naoki Inaba have on Amazon?
KDPTop tracks 5 of their books; 5 made an Amazon list in the last 30 days.
Which categories does Naoki Inaba publish in?
Their books chart most often in Geometry & Topology, Puzzles, Logic & Brain Teasers.
How does Naoki Inaba price their books?
The median price is $8.34; half of the books cost $6.99–$14.20.
Has Naoki Inaba released new books recently?
0 new books 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.