KDP categories · Top KDP authors
isobe: Amazon KDP author data
As of Nov 6, 2026, isobe has 2 books on Amazon, 2 of them on a best-seller list in the last 30 days (best rank #1), mostly in Programming, Mathematics, Languages & Tools.
| Median price | $12 |
|---|---|
| Price range (middle 50%) | $12 – $12 |
| Median reviews | - |
| Total reviews | 0 |
| New listings (30 days, incl. new editions) | 1 |
| Breakout books (30 days) | 1 |
What stands out
- Median price $12, 20% above the median of their main category, Programming.
isobe's best-ranked books
-
Lean 4 Mathematics Handbook: From High-School Mathematics to Modern Mathematics
by isobe
- Price$12
- Reviews-
-
Writing Mathematical Proofs in Lean 4
by isobe
- Price$12
- Reviews-
Main categories
FAQ
How many books does isobe have on Amazon?
KDPTop tracks 2 of their books; 2 made an Amazon list in the last 30 days.
Which categories does isobe publish in?
Their books chart most often in Programming, Mathematics, Languages & Tools.
How does isobe price their books?
The median price is $12; half of the books cost $12–$12.
Has isobe released new books recently?
1 new book in the last 30 days, 1 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.