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John C Harris: Amazon KDP author data
As of Nov 6, 2026, John C Harris has 13 books on Amazon, 11 of them on a best-seller list in the last 30 days (best rank #3), mostly in Osteoporosis, Musculoskeletal Diseases, Medical Conditions & Diseases.
| Median price | $2.99 |
|---|---|
| Price range (middle 50%) | $0.99 – $5.49 |
| Median reviews | 3 |
| Total reviews | 100 |
| New books (30 days) | 7 |
| Breakout books (30 days) | 3 |
What stands out
- 85% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $2.99, 81% below the median of their main category, Osteoporosis.
- 7 new books in the last 30 days, 3 of them broke into a Best Sellers list.
John C Harris's best-ranked books
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Not Done Yet: Strength, Muscle, and Health After 50 (Proud Boomer Wellness Book 1)
by John C Harris
- Price$5.99
- Rating4.9
- Reviews39
-
Not Done Yet: Strength, Muscle, and Health After 50 (Proud Boomer Wellness)
by John C Harris
- Price$15.99
- Rating4.9
- Reviews39
-
Not Done Yet: The 12-Week Strength Reset: A Program for Building Strength, Muscle, and Confidence After 50 (Proud Boomer Wellness)
by John C Harris
- Price$2.99
- Rating4.1
- Reviews4
-
WRITING IS THE EASY PART: A Plain-Language Marketing and Copywriting Course for Self-Published Authors (Proud Boomer Press Book 1)
by John C Harris
- Price$0.99
- Reviews-
- Published2026-10
-
NASM CWC EXAM PREP: The No-Nonsense Study Guide to Passing the Certified Wellness Coach Exam (Proud Boomer Press Book 2)
by John C Harris
- Price$2.99
- Reviews-
-
Financing the Existing Commercial Building: Improving Building Performance, Expanding Access to Capital, and Putting Private Investment to Work Through C-PACE
by John C Harris
- Price$39.95
- Reviews-
-
The Athyreotic Body: Living Strong After Thyroid Cancer and Total Thyroidectomy
by John C Harris
- Price$2.99
- Rating5.0
- Reviews1
-
Put It Down: Stress, Resentment, and the Weight You Don’t Have to Carry (Proud Boomer Wellness Book 2)
by John C Harris
- Price$4.99
- Rating4.6
- Reviews12
-
The Proud Boomer Table: Eating for Strength, Body Composition, and Longevity Without Making Food Your Whole Personality
by John C Harris
- Price$0
- Rating5.0
- Reviews2
- Published2026-07
-
Turn Off the Alarm: A Vagus Nerve Guide to Calming Chronic Inflammation and Getting Your Body Back After Illness (Proud Boomer Press Book 5)
by John C Harris
- Price$1
- Rating5.0
- Reviews2
Main categories
FAQ
How many books does John C Harris have on Amazon?
KDPTop tracks 13 of their books; 11 made an Amazon list in the last 30 days.
Which categories does John C Harris publish in?
Their books chart most often in Osteoporosis, Musculoskeletal Diseases, Medical Conditions & Diseases.
How does John C Harris price their books?
The median price is $2.99; half of the books cost $0.99–$5.49.
Has John C Harris released new books recently?
7 new books in the last 30 days, 3 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.