KDP categories · Top KDP authors
Radar: Amazon KDP category data
Amazon Books Best Sellers data for Radar, updated Nov 2, 2026: median price $125, median 9 reviews, average rating 4.3 and a KDPTop opportunity score of 31/100 (highly competitive).
| Price range (middle 50%) | $66.92 – $145 |
|---|---|
| Average rating | 4.3 |
| New releases (90 days) | 21% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 7% of the parent category Telecommunications & Sensors (128), one of the easier corners under it.
- At $125 its median price beats 99% of Books categories, leaving more margin per copy.
- 21% of its best sellers came out in the last 90 days, more than in 91% of Books categories: readers here keep buying new titles.
Top 10 Radar best sellers
-
AFOQT Study Guide: Air Force Officer Qualifying Test Prep Book (2026-2027)
by Military Prep Academy
- List rank#1
- Price$22.78
- Rating4.6
- Reviews643
-
A Summer Bright and Terrible: Winston Churchill, Lord Dowding, Radar, and the Impossible Triumph of the Battle of Britain
by David Fisher
- List rank#2
- Price$1.99
- Rating4.5
- Reviews72
-
EW 102: A Second Course in Electronic Warfare
by David L Adamy
- List rank#3
- Price$116
- Rating4.4
- Reviews23
-
Ew 101: A First Course in Electronic Wa (Artech House Radar Library (Hardcover))
by David L Adamy
- List rank#4
- Price$133
- Rating4.5
- Reviews65
-
Churchill's Shadow Raiders: The Race to Develop Radar, World War II's Invisible Secret Weapon
by Damien Lewis
- List rank#5
- Price$9.99
- Rating4.6
- Reviews410
-
Fundamentals of Radar Signal Processing, Third Edition
by Mark A. Richards
- List rank#6
- Price$101
- Rating4.6
- Reviews29
-
Radar Systems Engineering Essentials: Understanding Detection, Tracking, Signal Processing, and Multi-Domain Surveillance Architectures
by Sterling Ainsley
- List rank#7
- Price$12.88
- Rating1.0
- Reviews1
-
Ham Radio DX - A Complete Guide: How to go from Karaoke to a DXCC Rockstar
by Lucas Ford
- List rank#8
- Price$9.99
- Rating4.6
- Reviews58
-
Amateur Radio HF Antennas: Book One An Introduction
by Claude Jollet
- List rank#9
- Price$0.99
- Rating4.1
- Reviews133
-
Mastering Morse Code for HAM Radio: Comprehensive Guide to Learning and Practicing the Code
- List rank#10
- Price$12.99
- Rating4.3
- Reviews3
FAQ
Is Radar a good niche for Amazon KDP?
Its KDPTop opportunity score is 31/100, which makes it highly competitive. The median best seller has 9 reviews and sells for $125.
How many reviews do you need to rank in Radar?
The median best seller has 9 reviews, and 98% of them have fewer than 100.
What do Radar best sellers cost?
The median price is $125; half of the best sellers are priced between $66.92 and $145.
Can new books break into Radar?
21% 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.