KDP categories · Top KDP authors
William J Callaway RT R: Amazon KDP author data
As of Nov 6, 2026, William J Callaway RT R has 3 books on Amazon, 3 of them on a best-seller list in the last 30 days (best rank #1), mostly in Radiological & Ultrasound Technology, Radiologic & Ultrasound Technology, Allied Health Services.
| Median price | $77.43 |
|---|---|
| Price range (middle 50%) | $73.15 – $81.71 |
| Median reviews | 321 |
| Total reviews | 1,117 |
| New books (30 days) | 0 |
| Breakout books (30 days) | 0 |
William J Callaway RT R's best-ranked books
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Mosby's Comprehensive Review of Radiography: The Complete Study Guide and Career Planner
by William J Callaway RT R
- Price$85.99
- Rating4.8
- Reviews321
- Published2022-04
-
Introduction to Radiologic Technology
by William J Callaway RT R
- Price$68.99
- Rating4.7
- Reviews27
-
Mosby's Comprehensive Review of Radiography: The Complete Study Guide and Career Planner
by William J Callaway RT R
- Price-
- Rating4.7
- Reviews770
Main categories
FAQ
How many books does William J Callaway RT R have on Amazon?
KDPTop tracks 3 of their books; 3 made an Amazon list in the last 30 days.
Which categories does William J Callaway RT R publish in?
Their books chart most often in Radiological & Ultrasound Technology, Radiologic & Ultrasound Technology, Allied Health Services.
How does William J Callaway RT R price their books?
The median price is $77.43; half of the books cost $73.15–$81.71.
Has William J Callaway RT R 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.