KDP categories · Top KDP authors
Cardiology (Internal Medicine, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Cardiology (Internal Medicine, Kindle eBooks), updated Nov 2, 2026: median price $9.99, median 28 reviews, average rating 4.5 and a KDPTop opportunity score of 30/100 (highly competitive).
| Price range (middle 50%) | $6.99 – $14.99 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 12% |
| Books on the list | 99 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 4% of the parent category Internal Medicine (776), one of the easier corners under it.
Top 10 Cardiology best sellers
-
Understanding AFib: Think Clearly About AFib. Make Confident Treatment Decisions
by Scott Lee MD
- List rank#1
- Price$9.99
- Rating4.6
- Reviews49
-
THE HOMOCYSTEINE CLINICAL HANDBOOK: Diagnostic Protocols, 22 Genetic SNPs, and Cytokine Management (Outlive Your Toxic Genetics)
by Dan Purser MD
- List rank#2
- Price$2.99
- Reviews-
-
Raising the Dead: A Doctor Encounters the Miraculous
by Chauncey Crandall
- List rank#3
- Price$2.99
- Rating4.6
- Reviews717
-
![[Sue Black] All That Remains: A Renowned Forensic Scientist on Death, Mortality, and Solvi book cover by Sue Black](https://images-na.ssl-images-amazon.com/images/I/61wiEmrFYPL._AC_UL300_SR300,200_.jpg)
[Sue Black] All That Remains: A Renowned Forensic Scientist on Death, Mortality, and Solving Crimes
by Sue Black
- List rank#4
- Price$7.99
- Rating4.5
- Reviews5,376
-
Dysautonomia And Autonomic Nervous System Disorders: The Comprehensive Patient And Physician Guide To Symptoms, Diagnosis, POTS, And Long-Term Management Of Autonomic Dysfunction
by Dr. James Heaton
- List rank#5
- Price$9.99
- Rating5.0
- Reviews2
-
ECG | EKG Interpretation for Nurses: A Visual, Step-by-Step Guide with Clinical Illustrations and Case Studies
by Colson Ridge
- List rank#6
- Price$7.99
- Rating4.6
- Reviews33
-
The Miraculous Cure for and Prevention of Heart Disease The Evolutionary Breakthrough Doctors Never Learned About Reversing Calcification, Cholesterol, Hypertension — and Heart Failure
by Jeff T. Bowles
- List rank#7
- Price$4.99
- Rating4.5
- Reviews19
-
The AFib Cure, Updated Edition: Get Off Your Medications, Take Control of Your Health, and Add Years to Your Life
by John D. Day
- List rank#8
- Price$12.99
- Rating4.6
- Reviews1,147
-
Cholesterol Clarity: What The Hdl Is Wrong With My Numbers?
by Jimmy Moore
- List rank#9
- Price$12.36
- Rating4.6
- Reviews1,144
-
The Caregiver's Guide to Stroke Recovery: Practical Advice for Caring for You and Your Loved One
by Lucille Jorgensen
- List rank#10
- Price$3.99
- Rating4.7
- Reviews111
FAQ
Is Cardiology a good niche for Amazon KDP?
Its KDPTop opportunity score is 30/100, which makes it highly competitive. The median best seller has 28 reviews and sells for $9.99.
How many reviews do you need to rank in Cardiology?
The median best seller has 28 reviews, and 64% of them have fewer than 100.
What do Cardiology best sellers cost?
The median price is $9.99; half of the best sellers are priced between $6.99 and $14.99.
Can new books break into Cardiology?
12% of the current best sellers were released in the last 90 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.