KDP categories · Top KDP authors
Brain (Diseases, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Brain (Diseases, Kindle eBooks), updated Nov 2, 2026: median price $7.12, median 16 reviews, average rating 4.6 and a KDPTop opportunity score of 21/100 (highly competitive).
| Price range (middle 50%) | $3.99 – $9.99 |
|---|---|
| Average rating | 4.6 |
| New releases (90 days) | 11% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 4% of the parent category Diseases (368), one of the easier corners under it.
- Its review barrier is lower than in 76% of Kindle eBooks categories: the median best seller has only 16 reviews, so new books can chart with few.
- Prices spread wide: the middle half runs from $3.99 to $9.99, so budget editions and premium or boxed sets sell side by side.
Top 10 Brain best sellers
-
Everything You Need To Know About Parkinson's Disease (All About Parkinson's)
by Lianna Marie
- List rank#1
- Price$0.99
- Rating4.5
- Reviews369
-
Defying Parkinsons: Cutting Edge Therapies That Outperform Standard Neurological Treatments
by Gregory Eckel
- List rank#2
- Price$0.99
- Rating4.8
- Reviews363
-
Neurology and Brain Disorders: A Comprehensive College and MBBS-Level Guide to the Nervous System, Neurological Diseases, Diagnosis, Emergencies, and Rehabilitation
by Sanjay K.
- List rank#3
- Price$3.49
- Reviews-
-
Wildtype: Living With Brain Cancer
by Nicolas Thomas
- List rank#4
- Price$5.99
- Rating4.7
- Reviews34
-
Tangled Up: The History and Science of Alzheimer's Disease
by Michael Hornberger
- List rank#5
- Price$4.99
- Rating4.6
- Reviews14
-
Love, Dignity, and Parkinson’s: from Care Partner to Caregiver
by Terri Pease Ph.D.
- List rank#6
- Price$9.99
- Rating4.8
- Reviews178
-
Restored Hope: A Neuroscience Guide to Optimal Brain and Human Function
by David Stephens
- List rank#7
- Price$2.99
- Rating4.3
- Reviews22
-
The End of Migraines: 150 Ways to Stop Your Pain
by Alexander Mauskop
- List rank#8
- Price$9.95
- Rating4.6
- Reviews203
-
Hungry for Life: A Memoir Unlocking the Truth Inside an Anorexic Mind
by Rachel Richards
- List rank#9
- Price$3.99
- Rating4.4
- Reviews409
-
Defeating Dementia: My Recovery from Alzheimer's
by Francis C. McNear
- List rank#10
- Price$7.25
- Rating4.4
- Reviews223
FAQ
Is Brain a good niche for Amazon KDP?
Its KDPTop opportunity score is 21/100, which makes it highly competitive. The median best seller has 16 reviews and sells for $7.12.
How many reviews do you need to rank in Brain?
The median best seller has 16 reviews, and 79% of them have fewer than 100.
What do Brain best sellers cost?
The median price is $7.12; half of the best sellers are priced between $3.99 and $9.99.
Can new books break into Brain?
11% 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.