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Immune Systems (Diseases & Physical Ailments, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Immune Systems (Diseases & Physical Ailments, Kindle eBooks), updated Nov 3, 2026: median price $9.99, median 234 reviews, average rating 4.6 and a KDPTop opportunity score of 28/100 (highly competitive).
| Price range (middle 50%) | $4.99 – $14.99 |
|---|---|
| Average rating | 4.6 |
| New releases (90 days) | 10% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 33% of the parent category Diseases & Physical Ailments (714), one of the easier corners under it.
- Its review barrier is higher than in 70% of Kindle eBooks categories: the median best seller has 234 reviews, so new books need time to build up.
- Prices spread wide: the middle half runs from $4.99 to $14.99, so budget editions and premium or boxed sets sell side by side.
Top 10 Immune Systems best sellers
-
Bloodlines: A Memoir
- List rank#1
- Price$14.99
- Rating4.5
- Reviews95
-
The Lymphatic Flow Method: The Step-by-Step System to Reduce Inflammation, Support Detox, and Restore Whole-Body Flow at Home
by Dr. Caitlin Czezowski
- List rank#2
- Price$17.99
- Reviews-
-
The Lady's Handbook for Her Mysterious Illness: A Memoir
by Sarah Ramey
- List rank#3
- Price$14.99
- Rating4.5
- Reviews640
-
Ending Chronic Illness: A Revolutionary New Program to Reverse Inflammation and Heal Persistent Disease
- List rank#4
- Price$16.99
- Rating4.4
- Reviews11
-
Plant Powered Plus: Activate the Power of Your Gut to Tame Inflammation and Reclaim Your Health
- List rank#5
- Price$15.99
- Rating4.6
- Reviews435
-
Into the Blue: The Reese's Book Club Pick! The will-they-won't-they love story with intense yearning loved by Taylor Jenkins Reid
by Emma Brodie
- List rank#6
- Price-
- Rating4.2
- Reviews14,838
-
Dirty Genes: A Revolutionary Approach to Health and Wellness Through Nutritional Genetics and Personalized Plans for a Happier, Healthier You
by Ben Lynch ND.
- List rank#7
- Price$14.99
- Rating4.7
- Reviews3,630
-
The Web That Has No Weaver: Understanding Chinese Medicine
by Ted J. Kaptchuk
- List rank#8
- Price$9.16
- Rating4.7
- Reviews941
-
The Plant Paradox: The Hidden Dangers in "Healthy" Foods That Cause Disease and Weight Gain – An NYT Bestselling Medical Nutrition Guide to Longevity and Wellness
- List rank#9
- Price$13.49
- Rating4.4
- Reviews17,214
-
Inflammation Fix: Root-Cause Healing in a Symptom-Chasing World
by Judy Cho
- List rank#10
- Price$16.99
- Reviews-
Same niche in Books: Immune Systems
FAQ
Is Immune Systems a good niche for Amazon KDP?
Its KDPTop opportunity score is 28/100, which makes it highly competitive. The median best seller has 234 reviews and sells for $9.99.
How many reviews do you need to rank in Immune Systems?
The median best seller has 234 reviews, and 40% of them have fewer than 100.
What do Immune Systems best sellers cost?
The median price is $9.99; half of the best sellers are priced between $4.99 and $14.99.
Can new books break into Immune Systems?
10% 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.