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Margaret Hartley: Amazon KDP author data
As of Nov 6, 2026, Margaret Hartley has 2 books on Amazon, 2 of them on a best-seller list in the last 30 days (best rank #1), mostly in Study Guides, Study & Test-Taking Skills, Nursing.
| Median price | $18.48 |
|---|---|
| Price range (middle 50%) | $15.73 – $21.23 |
| Median reviews | 253 |
| Total reviews | 506 |
| New books (30 days) | 0 |
| Breakout books (30 days) | 0 |
What stands out
- Median price $18.48, 131% above the median of their main category, Study Guides.
Margaret Hartley's best-ranked books
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RBT Study Guide: Pass the Registered Behavior Technician Exam on Your First Try the Easy Way | Includes Effective Strategies, Insider Secrets, 600+ Practice Questions & In-Depth Answer Explanations
by Margaret Hartley
- Price$12.99
- Rating4.5
- Reviews253
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RBT Study Guide: Pass the Registered Behavior Technician Exam the Easy Way | Includes Effective Strategies, Insider Secrets, 600+ Practice Questions & In-Depth Answer Explanations
by Margaret Hartley
- Price$23.97
- Rating4.5
- Reviews253
- Published2024-09
Main categories
FAQ
How many books does Margaret Hartley have on Amazon?
KDPTop tracks 2 of their books; 2 made an Amazon list in the last 30 days.
Which categories does Margaret Hartley publish in?
Their books chart most often in Study Guides, Study & Test-Taking Skills, Nursing.
How does Margaret Hartley price their books?
The median price is $18.48; half of the books cost $15.73–$21.23.
Has Margaret Hartley 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.