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Jose Valladares: Amazon KDP author data
As of Nov 6, 2026, Jose Valladares has 116 books on Amazon, 12 of them on a best-seller list in the last 30 days (best rank #3), mostly in Study & Teaching, Number Systems, Exercises.
| Median price | $7.43 |
|---|---|
| Price range (middle 50%) | $4.99 – $9.99 |
| Median reviews | 1 |
| Total reviews | 57 |
| New listings (30 days, incl. new editions) | 4 |
| Breakout books (30 days) | 1 |
What stands out
- Only 10% of the catalog charted in the last 30 days; sales rest on a few titles.
- Median price $7.43, 17% below the median of their main category, Study & Teaching.
- 4 new listings in the last 30 days (new editions included), 1 of them broke into a Best Sellers list.
Jose Valladares's best-ranked books
-
The Soroban: A Modern Guide for Adult Beginners
by Jose Valladares
- Price$9.99
- Rating5.0
- Reviews1
-
Water From Air: The Survival System
by Jose Valladares
- Price$9.99
- Rating3.7
- Reviews13
-
Water From Air: The Survival System
by Jose Valladares
- Price$24.99
- Rating3.7
- Reviews13
- Published2026-02
-
Build Your Own Battery: A Hands-On Handbook of Cells, Chemistry, and Stored Energy
by Jose Valladares
- Price$14.99
- Reviews-
- Published2026-08
-
Advanced Calculus: A Rigorous Foundation for Mathematical Thinking
by Jose Valladares
- Price$79.99
- Reviews-
-
Complete Piano Fingering: Practice Sheets for Left-Hand and Right-Hand Technique
by Jose Valladares
- Price$9.99
- Rating4.0
- Reviews1
-
Electricity From Scratch: The Survival System
by Jose Valladares
- Price$29.99
- Rating1.0
- Reviews1
-
Fuel from Scratch: Understanding Home-Scale Alternative Fuels — Safety, Legality, and Preparedness
by Jose Valladares
- Price$24.99
- Reviews-
-
Advanced Mathematics: Core Concepts and Applications
by Jose Valladares
- Price$49.99
- Reviews-
-
Water From Air: The Survival System
by Jose Valladares
- Price$40.37
- Rating3.7
- Reviews13
- Published2026-02
Main categories
FAQ
How many books does Jose Valladares have on Amazon?
KDPTop tracks 116 of their books; 12 made an Amazon list in the last 30 days.
Which categories does Jose Valladares publish in?
Their books chart most often in Study & Teaching, Number Systems, Exercises.
How does Jose Valladares price their books?
The median price is $7.43; half of the books cost $4.99–$9.99.
Has Jose Valladares released new books recently?
4 new books 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.