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Robert Walker: Amazon KDP author data
As of Nov 6, 2026, Robert Walker has 135 books on Amazon, 25 of them on a best-seller list in the last 30 days (best rank #25), mostly in Social Policy, Encryption, Social Work.
| Median price | $9.99 |
|---|---|
| Price range (middle 50%) | $5.99 – $15.99 |
| Median reviews | 5 |
| Total reviews | 718 |
| New books (30 days) | 13 |
| Breakout books (30 days) | 6 |
What stands out
- 13 new books in the last 30 days, 6 of them broke into a Best Sellers list.
Robert Walker's best-ranked books
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Business Associations for the NextGen Bar Exam: 2026–2027 Study Guide with Plain-English Outlines, 297 Practice Questions & 400 Flashcards (BARGO NextGen Bar Exam Study Guides)
by Robert Walker
- Price$29.99
- Reviews-
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Ferdinand the Frog: Visits the Outside World
by Robert Walker
- Price$3.49
- Rating5.0
- Reviews2
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Constitutional Law for the NextGen Bar Exam: 2026–2027 Study Guide with Plain-English Outlines, 380 Practice Questions & 496 Flashcards (BARGO NextGen Bar Exam Study Guides Book 3)
by Robert Walker
- Price$12.99
- Reviews-
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Torts for the NextGen Bar Exam: 2026–2027 Study Guide with Plain-English Outlines, 386 Practice Questions & 521 Flashcards (BARGO NextGen Bar Exam Study Guides Book 8)
by Robert Walker
- Price$12.99
- Rating1.0
- Reviews1
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Cobras: The Building of the Leaf Spring Cars
by Robert Walker
- Price$168
- Rating5.0
- Reviews2
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Family Law & Trusts and Estates Practice for the NextGen Bar Exam: 2026–2027 Study Guide to the Provided-Resource Subjects with Plain-English Outlines, ... NextGen Bar Exam Study Guides Book 9)
by Robert Walker
- Price$12.99
- Reviews-
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AAISM Study Guide 2026–2027: ISACA Advanced in AI Security Management — 1,807 practice questions with every option explained, 5 full-length exams
by Robert Walker
- Price$12.99
- Reviews-
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THE SOCIALIST PARADOX: Why America Fears the Word—and Already Accepts Much of the Idea (The American Paradox Series Book 4)
by Robert Walker
- Price$2.99
- Reviews-
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THE DOOMSDAY TIMETABLE (The Price of History Book 1)
by Robert Walker
- Price$4.99
- Rating4.5
- Reviews10
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AAIA Study Guide: ISACA Advanced in AI Audit — 678 practice questions with every option explained, 3 full-length exams, foundations and domain reviews
by Robert Walker
- Price$29.99
- Reviews-
Main categories
FAQ
How many books does Robert Walker have on Amazon?
KDPTop tracks 135 of their books; 25 made an Amazon list in the last 30 days.
Which categories does Robert Walker publish in?
Their books chart most often in Social Policy, Encryption, Social Work.
How does Robert Walker price their books?
The median price is $9.99; half of the books cost $5.99–$15.99.
Has Robert Walker released new books recently?
13 new books in the last 30 days, 6 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.