KDP categories · Top KDP authors
Reference (Pharmacology, Books): Amazon KDP category data
Amazon Books Best Sellers data for Reference (Pharmacology, Books), updated Nov 3, 2026: median price $24.99, median 11 reviews, average rating 4.3 and a KDPTop opportunity score of 26/100 (highly competitive).
| Price range (middle 50%) | $18.82 – $36.85 |
|---|---|
| Average rating | 4.3 |
| New releases (90 days) | 20% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 4% of the parent category Pharmacology (252), one of the easier corners under it.
- 20% of its best sellers came out in the last 90 days, more than in 90% of Books categories: readers here keep buying new titles.
- Its review barrier is lower than in 82% of Books categories: the median best seller has only 11 reviews, so new books can chart with few.
Top 10 Reference best sellers
-
Pharmacy Technician – PTCE: QuickStudy Laminated Reference Guide (Quickstudy Medical)
by Sarah Liu MA CPhT
- List rank#1
- Price$6.48
- Rating4.7
- Reviews3,933
-
Finding Fenbendazole: My Unexpected Path Through Cancer
by Roger Rasmussen
- List rank#2
- Price$17.34
- Rating4.7
- Reviews325
-
AMOXICILINA EXPLICADA 500 mg, Infecciones y Uso Responsable: La guía clara sobre el antibiótico más usado: para qué sirve, cómo actúa contra las bacterias y cuándo se receta (Spanish Edition)
by Elena Vargas
- List rank#3
- Price$15.50
- Rating2.9
- Reviews15
-
Pharmacy Calculations for Pharmacy Technicians: Master Calculations The Safe & Easy Way Without Formulas
- List rank#4
- Price$17.61
- Rating4.6
- Reviews1,266
-
Top 250 Drugs Simplified: A Visual Pharmacology Study Guide and Coloring Workbook with Memory Hooks, Drug Class Patterns, and Easier Recall Without the Overwhelm (Pharmacology Simplified Series)
by Olivia Jane Hartwell
- List rank#5
- Price$16.99
- Rating4.9
- Reviews25
-
ExCPT Study Guide: Domain-by-Domain, Medication Safety Breakdowns with Expert Strategies to Ace the Certification of Pharmacy Technicians Exam + 600 Q&As with Detailed Explanations (6 Full Tests)
by Halbert Allens
- List rank#6
- Price$24.99
- Rating4.9
- Reviews29
-
Antibiotics Made Easy: A Practical, Bedside Guide to Choosing, Dosing & Stopping Antibiotics – with Exam-Ready Mnemonics
by The Silent Medic
- List rank#7
- Price$4.99
- Reviews-
-
Medicinal Mushrooms Unscrambled: A User-Friendly Guide to Their Uses and Benefits
by Dr Michael Amaranthus
- List rank#8
- Price$15.74
- Rating5.0
- Reviews14
-
AMOXICILLIN EXPLAINED: 500 mg, Infections and Responsible Use The clear guide to the most widely used antibiotic: what it is for, how it works against bacteria, and when it is prescribed
by Elena Vargas
- List rank#9
- Price$15.50
- Rating1.0
- Reviews1
-
Top 300 Drugs Pocket Reference Guide (2024 Edition)
by Coventry House Publishing
- List rank#10
- Price$19.99
- Rating4.6
- Reviews1,015
FAQ
Is Reference a good niche for Amazon KDP?
Its KDPTop opportunity score is 26/100, which makes it highly competitive. The median best seller has 11 reviews and sells for $24.99.
How many reviews do you need to rank in Reference?
The median best seller has 11 reviews, and 88% of them have fewer than 100.
What do Reference best sellers cost?
The median price is $24.99; half of the best sellers are priced between $18.82 and $36.85.
Can new books break into Reference?
20% 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.