KDP categories · Top KDP authors
Reference (Reference, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Reference (Reference, Kindle eBooks), updated Nov 2, 2026: median price $9.99, median 59 reviews, average rating 4.5 and a KDPTop opportunity score of 30/100 (highly competitive).
| Price range (middle 50%) | $4.99 – $12.99 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 6% |
| Books on the list | 99 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 6% of the parent category Reference (1,036), one of the easier corners under it.
- Prices spread wide: the middle half runs from $4.99 to $12.99, so budget editions and premium or boxed sets sell side by side.
Top 10 Reference best sellers
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The Complete Home Apothecary Book: 401 Easy, Step-by-Step Herbal Remedies and Powerful Blends to Relieve Pain, Boost Immunity, Improve Sleep, and Restore Balance Naturally
by Ava Green
- List rank#2
- Price$9.99
- Rating4.3
- Reviews1,219
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The Essential Prepper's Medical Handbook: The Pocket Sized Survival Guide
by Edwin Hose
- List rank#3
- Price$0.99
- Rating4.2
- Reviews59
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DSM-5-TR Desk Reference Diagnostic Criteria Guide: A Pocket Companion for Quick and Accessible Diagnostic Information
by Nicholas Strathford
- List rank#4
- Price$2.99
- Rating4.0
- Reviews41
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Passionista: The Empowered Woman's Guide to Pleasuring a Man (Kerner Book 4)
by Ian Kerner
- List rank#5
- Price$12.99
- Rating4.4
- Reviews1,474
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Medical Spanish Visual Dictionary: Modern English to Spanish Medical Terminology with 5,000 Visual Terms for Healthcare Professionals & Students (Pocket Size)
- List rank#6
- Price$9.99
- Rating4.7
- Reviews33
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Dosage Calculations for Nursing Students: Master Dosage Calculations The Safe & Easy Way Without Formulas! (Dosage Calculation Success Series Book 1)
- List rank#7
- Price$9.99
- Rating4.5
- Reviews2,042
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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#8
- Price$13.49
- Rating4.4
- Reviews17,214
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DSM-5-TR Visual Reference Guide for Students & Trainees: Study Smarter, Diagnose Faster, and Build Clinical Confidence — With Flowcharts, Symptom Grids, and ICD-10 Crosswalks
by Bamboo Circle Books
- List rank#9
- Price$9.99
- Rating4.6
- Reviews87
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The Ultimate Guide to Methylene Blue: Remarkable Hope for Depression, COVID, AIDS & other Viruses, Alzheimer’s, Autism, Cancer, Heart Disease, Cognitive ... Targeting Mitochondrial Dysfunction)
by Mark Sloan
- List rank#10
- Price$2.99
- Rating4.7
- Reviews3,787
Subcategories
Same niche in Books: Language Study & Reference
FAQ
Is Reference a good niche for Amazon KDP?
Its KDPTop opportunity score is 30/100, which makes it highly competitive. The median best seller has 59 reviews and sells for $9.99.
How many reviews do you need to rank in Reference?
The median best seller has 59 reviews, and 57% of them have fewer than 100.
What do Reference best sellers cost?
The median price is $9.99; half of the best sellers are priced between $4.99 and $12.99.
Can new books break into Reference?
6% 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.