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David Eifrig: Amazon KDP author data
As of Nov 6, 2026, David Eifrig has 4 books on Amazon, 2 of them on a best-seller list in the last 30 days (best rank #9), mostly in Internal Medicine, Diseases, Medicine.
| Median price | $8.99 |
|---|---|
| Price range (middle 50%) | $7.24 – $11.49 |
| Median reviews | 58 |
| Total reviews | 239 |
| New books (30 days) | 1 |
| Breakout books (30 days) | 1 |
What stands out
- Median price $8.99, 45% below the median of their main category, Internal Medicine.
David Eifrig's best-ranked books
-
POWER UP YOUR BRAIN! 23 Evidence-Based Techniques to Prevent, Stop, and Even Reverse Cognitive Decline
by David Eifrig
- Price$9.99
- Rating5.0
- Reviews4
- Published2026-09
-
POWER UP YOUR BRAIN! 23 Evidence-Based Techniques to Prevent, Stop, and Even Reverse Cognitive Decline
by David Eifrig
- Price$7.99
- Rating5.0
- Reviews4
-
The Doctor's Protocol Field Manual
by David Eifrig
- Price$4.99
- Rating4.4
- Reviews118
-
High Income Retirement: How to Safely Earn 12% to 20% Income Streams on Your Savings
by David Eifrig
- Price$15.99
- Rating4.1
- Reviews113
Main categories
FAQ
How many books does David Eifrig have on Amazon?
KDPTop tracks 4 of their books; 2 made an Amazon list in the last 30 days.
Which categories does David Eifrig publish in?
Their books chart most often in Internal Medicine, Diseases, Medicine.
How does David Eifrig price their books?
The median price is $8.99; half of the books cost $7.24–$11.49.
Has David Eifrig released new books recently?
1 new book in the last 30 days, 1 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.