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Ethan R Caldwell: Amazon KDP author data
As of Nov 6, 2026, Ethan R Caldwell has 9 books on Amazon, 7 of them on a best-seller list in the last 30 days (best rank #31), mostly in Asia, Intelligence & Espionage, Prep School.
| Median price | $17.29 |
|---|---|
| Price range (middle 50%) | $9.99 – $21.02 |
| Median reviews | 5 |
| Total reviews | 11 |
| New books (30 days) | 7 |
| Breakout books (30 days) | 3 |
What stands out
- 78% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $17.29, 43% above the median of their main category, Asia.
- 7 new books in the last 30 days, 3 of them broke into a Best Sellers list.
Ethan R Caldwell's best-ranked books
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The Laser Engraving Handbook: A Pratical Guide to Machine Setup, Design, Materials, Safety & Techniques
by Ethan R Caldwell
- Price$20.99
- Reviews-
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The complete arduino app lab guide : A Practical Handbook for Building, Programming, and Controlling Arduino Projects with App Lab (22nd century tech and engineering)
by Ethan R Caldwell
- Price$9.99
- Reviews-
- Published2026-10
-
Act Prep Book 2026-2027: The Complete Study Guide with Proven Test-Taking Strategies, Full-Length Practice Tests, and Step-by-Step Review to Achieve Your Best Score.
by Ethan R Caldwell
- Price$9.99
- Rating5.0
- Reviews5
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Act Prep Book 2026-2027: The Complete Study Guide with Proven Test-Taking Strategies, Full-Length Practice Tests, and Step-by-Step Review to Achieve Your Best Score.
by Ethan R Caldwell
- Price$19.97
- Rating5.0
- Reviews5
- Published2026-10
-
World War I Trench Warfare: Life, Death, and Survival on the Western Front (War History for Beginners Book 1)
by Ethan R Caldwell
- Price$0
- Rating1.0
- Reviews1
- Published2026-06
-
MACV-SOG: Shadow Raiders: Secret Missions, Cross-Border Reconnaissance, Ambushes, and America’s Hidden War in Vietnam (War History for Beginners Book 2)
by Ethan R Caldwell
- Price$4.99
- Reviews-
- Published2026-09
-
Aux origines d’un empire: Naissance de l’Islam et premières conquêtes arabes (French Edition)
by Ethan R Caldwell
- Price$21.09
- Reviews-
- Published2025-12
-
The complete arduino app lab guide: A Practical Handbook for Building, Programming, and Controlling Arduino Projects with App Lab (22nd century tech and engineering)
by Ethan R Caldwell
- Price$39.69
- Reviews-
-
MACV-SOG: Shadow Raiders: Secret Missions, Cross-Border Reconnaissance, Ambushes, and America’s Hidden War in Vietnam (War History for Beginners, Book 2)
by Ethan R Caldwell
- Price$14.60
- Reviews-
Main categories
FAQ
How many books does Ethan R Caldwell have on Amazon?
KDPTop tracks 9 of their books; 7 made an Amazon list in the last 30 days.
Which categories does Ethan R Caldwell publish in?
Their books chart most often in Asia, Intelligence & Espionage, Prep School.
How does Ethan R Caldwell price their books?
The median price is $17.29; half of the books cost $9.99–$21.02.
Has Ethan R Caldwell released new books recently?
7 new books in the last 30 days, 3 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.