KDP categories · Top KDP authors
Research & Theory (Nursing, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Research & Theory (Nursing, Kindle eBooks), updated Nov 2, 2026: median price $56.70, median 39 reviews, average rating 4.6 and a KDPTop opportunity score of 24/100 (highly competitive).
| Price range (middle 50%) | $29.99 – $74.98 |
|---|---|
| Average rating | 4.6 |
| New releases (90 days) | 5% |
| Books on the list | 98 |
| Store | Kindle eBooks |
What stands out
- At $56.70 its median price beats 99% of Kindle eBooks categories, leaving more margin per copy.
- Its median reviews are 45% of the parent category Nursing (88), one of the easier corners under it.
- Prices spread wide: the middle half runs from $29.99 to $74.98, so budget editions and premium or boxed sets sell side by side.
Top 10 Research & Theory best sellers
-
Polit & Beck's Essentials of Nursing Research
by Jane Flanagan
- List rank#1
- Price$91.19
- Rating5.0
- Reviews3
-
Evidence-Based Practice in Nursing & Healthcare: A Guide to Best Practice
by Bernadette Mazurek Melnyk
- List rank#2
- Price$87.47
- Rating4.4
- Reviews192
-
Fast Facts to Loving Your Research Project: A Stress-free Guide for Novice Researchers in Nursing and Healthcare
by Brenda Marshall
- List rank#3
- Price$19.79
- Rating4.7
- Reviews21
-
The Anatomy of Hope: How People Prevail in the Face of Illness
by Jerome Groopman
- List rank#4
- Price$9.99
- Rating4.6
- Reviews309
-
Theoretical Basis for Nursing
by Melanie McEwan
- List rank#5
- Price$91.19
- Rating4.6
- Reviews143
-
Understanding Nursing Research E-Book: Building an Evidence-Based Practice
by Susan K. Grove PhD, RN, ANP-BC, GNP-BC
- List rank#6
- Price$85.59
- Rating4.6
- Reviews61
-
Unitary Caring Science: Philosophy and Praxis of Nursing
by Jean Watson
- List rank#7
- Price$23.09
- Rating4.4
- Reviews36
-
Burns and Grove's The Practice of Nursing Research - E-Book: Appraisal, Synthesis, and Generation of Evidence
by Jennifer R. Gray PhD, RN, FAAN
- List rank#8
- Price$82.58
- Rating4.5
- Reviews4
-
Lectura crítica de la evidencia clínica (Spanish Edition)
by Juan Bautista Cabello López
- List rank#9
- Price$24.22
- Rating4.4
- Reviews12
-
THE ESSENTIAL GUIDE TO PALLIATIVE AND HOSPICE NURSING CARE ASSESSMENT AND CHARTING
- List rank#10
- Price$2.99
- Rating3.0
- Reviews2
Same niche in Books: Research & Theory
FAQ
Is Research & Theory a good niche for Amazon KDP?
Its KDPTop opportunity score is 24/100, which makes it highly competitive. The median best seller has 39 reviews and sells for $56.70.
How many reviews do you need to rank in Research & Theory?
The median best seller has 39 reviews, and 74% of them have fewer than 100.
What do Research & Theory best sellers cost?
The median price is $56.70; half of the best sellers are priced between $29.99 and $74.98.
Can new books break into Research & Theory?
5% 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.