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Daniel M. Harper: Amazon KDP author data
As of Nov 6, 2026, Daniel M. Harper has 4 books on Amazon, 2 of them on a best-seller list in the last 30 days (best rank #15), mostly in Electrical & Electronics, Electrical, Electromagnetism.
| Median price | $29.99 |
|---|---|
| Price range (middle 50%) | $21.49 – $32.75 |
| Median reviews | 11 |
| Total reviews | 11 |
| New books (30 days) | 2 |
| Breakout books (30 days) | 2 |
What stands out
- Median price $29.99, 26% above the median of their main category, Electrical & Electronics.
Daniel M. Harper's best-ranked books
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NEC 2026 Code Changes: Illustrated Guide to Understanding and Applying the National Electrical Code 2026 with Practical Explanations, Field Examples, Diagrams, and Real-World Applications
by Daniel M. Harper
- Price$12.99
- Reviews-
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NEC 2026 Code Changes: The Illustrated Guide to Understanding and Applying the National Electrical Code 2026 with Practical Explanations, Field ... and Real-World Applications for Electricians
by Daniel M. Harper
- Price$34.10
- Reviews-
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Comptia Network+ Study Guide: Exam Prep with 750+ Realistic Practice Questions Including Lab Simulations, Answer Keys & Performance Tracking
by Daniel M. Harper
- Price$29.99
- Rating5.0
- Reviews11
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NEC 2026 Code Handbook Illustrated: Learn, Understand, and Apply the 2026 National Electrical Code with Practical Explanations and Field Examples
by Daniel M. Harper
- Price-
- Reviews-
Main categories
FAQ
How many books does Daniel M. Harper have on Amazon?
KDPTop tracks 4 of their books; 2 made an Amazon list in the last 30 days.
Which categories does Daniel M. Harper publish in?
Their books chart most often in Electrical & Electronics, Electrical, Electromagnetism.
How does Daniel M. Harper price their books?
The median price is $29.99; half of the books cost $21.49–$32.75.
Has Daniel M. Harper released new books recently?
2 new books in the last 30 days, 2 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.