KDP categories · Top KDP authors
Richard A Preston: Amazon KDP author data
As of Nov 6, 2026, Richard A Preston has 4 books on Amazon, 3 of them on a best-seller list in the last 30 days (best rank #1), mostly in Nephrology, Diagnostics & Labs, Critical & Intensive Care.
| Median price | $23.23 |
|---|---|
| Price range (middle 50%) | $22.17 – $24.95 |
| Median reviews | 299 |
| Total reviews | 1,115 |
| New listings (30 days, incl. new editions) | 0 |
| Breakout books (30 days) | 0 |
What stands out
- Median price $23.23, 68% below the median of their main category, Nephrology.
Richard A Preston's best-ranked books
-
Acid-Base, Fluids, and Electrolytes Made Ridiculously Simple: Color Edition
by Richard A Preston
- Price$27.95
- Rating4.7
- Reviews457
- Published2026-03
-
Acid-Base, Fluids, and Electrolytes Made Ridiculously Simple (MedMaster Series)
by Richard A Preston
- Price$22.50
- Rating4.3
- Reviews60
-
Acid-Base, Fluids and Electrolytes Made Ridiculously Simple
by Richard A Preston
- Price$21.19
- Rating4.4
- Reviews141
-
Acid-Base, Fluids, and Electrolytes Made Ridiculously Simple
by Richard A Preston
- Price$23.95
- Rating4.7
- Reviews457
- Published2017-09
Main categories
FAQ
How many books does Richard A Preston have on Amazon?
KDPTop tracks 4 of their books; 3 made an Amazon list in the last 30 days.
Which categories does Richard A Preston publish in?
Their books chart most often in Nephrology, Diagnostics & Labs, Critical & Intensive Care.
How does Richard A Preston price their books?
The median price is $23.23; half of the books cost $22.17–$24.95.
Has Richard A Preston 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.