KDP categories · Top KDP authors
Robert B. Rain: Amazon KDP author data
As of Nov 6, 2026, Robert B. Rain has 5 books on Amazon, 2 of them on a best-seller list in the last 30 days (best rank #54), mostly in Human Rights, Constitutional Law, Educational Law & Legislation.
| Median price | $12.99 |
|---|---|
| Price range (middle 50%) | $9.99 – $12.99 |
| Median reviews | 1 |
| Total reviews | 1 |
| New books (30 days) | 2 |
| Breakout books (30 days) | 2 |
What stands out
- Median price $12.99, 30% above the median of their main category, Human Rights.
Robert B. Rain's best-ranked books
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CIPP/US 500 Interactive Practice Questions: Scenario-Based Questions with Instant Feedback
by Robert B. Rain
- Price$12.99
- Reviews-
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CIPP/E Practice Questions: 500 Practice Questions for Exam Preparation
by Robert B. Rain
- Price$12.99
- Reviews-
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AIGP Practice Questions: An Unofficial Study Workbook — 300 Practice Questions, Answer Keys & Explanations for the AI Governance Professional Exam
by Robert B. Rain
- Price$9.99
- Rating5.0
- Reviews1
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CIPP/E 500 Interactive Practice Questions: Scenario-Based Questions with Instant Feedback
by Robert B. Rain
- Price$12.99
- Reviews-
-
CompTIA A+ 500 Questions: Practice Exam Bank: Core 1 (220-1201) and Core 2 (220-1202)
by Robert B. Rain
- Price$9.99
- Reviews-
Main categories
FAQ
How many books does Robert B. Rain have on Amazon?
KDPTop tracks 5 of their books; 2 made an Amazon list in the last 30 days.
Which categories does Robert B. Rain publish in?
Their books chart most often in Human Rights, Constitutional Law, Educational Law & Legislation.
How does Robert B. Rain price their books?
The median price is $12.99; half of the books cost $9.99–$12.99.
Has Robert B. Rain 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.