KDP categories · Top KDP authors
Reference (Radio, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Reference (Radio, Kindle eBooks), updated Nov 2, 2026: median price $9.95, median 6 reviews, average rating 4.5 and a KDPTop opportunity score of 21/100 (highly competitive).
| Price range (middle 50%) | $3.99 – $9.99 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 0% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 8% of the parent category Radio (69), one of the easier corners under it.
- Only 0% of its best sellers are under 90 days old, fewer than in 99% of Kindle eBooks categories: established titles hold the list.
- Its review barrier is lower than in 87% of Kindle eBooks categories: the median best seller has only 6 reviews, so new books can chart with few.
Top 10 Reference best sellers
-
The Complete Baofeng Radio Bible for Beginners: Fast-Track Your Path to Becoming a Baofeng Pro with an Easy-to-Follow Guide to Staying Connected Whenever It Counts Most
by Eliab Barnet
- List rank#1
- Price$9.99
- Rating4.6
- Reviews224
-
Ham Radio Portable Antennas for Beginners: Step-by-Step Setups for POTA, SOTA, and Portable Ops — Choose the Right Antenna, Deploy Fast, Tune SWR with Confidence
by Walt McKinney
- List rank#2
- Price$12.99
- Rating4.8
- Reviews117
-
The Music of 1968: A weekly look at America’s top singles in the year of ‘Hey Jude’, ‘Love Is Blue’, ‘Honey’ and the peak of Motown (The Music of ... singles each year from 1964 to 1970 Book 5)
by Ken F. Jarrell
- List rank#3
- Price$2.99
- Rating4.8
- Reviews8
-
Bite Me!: The Unofficial Guide to Buffy the Vampire Slayer
by Nikki Stafford
- List rank#4
- Price$0.99
- Rating4.4
- Reviews35
-
Mastering Morse Code for HAM Radio: Practice Strategies and Tips (The Practical Ham Radio Operator)
- List rank#5
- Price$3.99
- Reviews-
-
Essential HAM Radio Accessories: Power Supplies, Microphones, and More (The Practical Ham Radio Operator)
- List rank#6
- Price$2.99
- Reviews-
-
The “Who Is Johnny Dollar?” Matter, Volume 1
by John C. Abbott
- List rank#7
- Price$9.95
- Rating5.0
- Reviews3
-
Sound Reporting, Second Edition: The NPR Guide to Broadcast, Podcast and Digital Journalism
by Jerome Socolovsky
- List rank#8
- Price$19.92
- Rating5.0
- Reviews10
-
Podcasting: How to Start a Podcast and Create a Profitable Podcasting Business
by Amanda Mayo
- List rank#9
- Price$5.99
- Rating4.6
- Reviews330
-
The Story of Earl Nightingale and His Strangest Secret : The Biography of The Father of Self-Help, Personal Development and Motivation
by Pamela Nightingale
- List rank#10
- Price$9.95
- Rating4.7
- Reviews30
Same niche in Books: Reference
FAQ
Is Reference a good niche for Amazon KDP?
Its KDPTop opportunity score is 21/100, which makes it highly competitive. The median best seller has 6 reviews and sells for $9.95.
How many reviews do you need to rank in Reference?
The median best seller has 6 reviews, and 87% of them have fewer than 100.
What do Reference best sellers cost?
The median price is $9.95; half of the best sellers are priced between $3.99 and $9.99.
Can new books break into Reference?
0% 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.