KDP categories · Top KDP authors
Cryptography: Amazon KDP category data
Amazon Books Best Sellers data for Cryptography, updated Nov 2, 2026: median price $24.99, median 47 reviews, average rating 4.5 and a KDPTop opportunity score of 35/100 (highly competitive).
| Price range (middle 50%) | $14.99 – $39.94 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 14% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 31% of the parent category Security & Encryption (151), one of the easier corners under it.
- At $24.99 its median price beats 84% of Books categories, leaving more margin per copy.
- 14% of its best sellers came out in the last 90 days, more than in 78% of Books categories: readers here keep buying new titles.
Top 10 Cryptography best sellers
-
Household Cybersecurity: A CPA’s Guide to Protecting Your Accounts and Personal Information (Financial Topics in 100 Pages or Less)
by Mike Piper
- List rank#1
- Price$9.99
- Rating4.9
- Reviews32
-
Found, Safe, and Fully Booked: 3 Books in 1: Get Recommended by AI, Protect Your Family from AI Scams, and Win More Local Customers
- List rank#2
- Price$13.48
- Reviews-
-
-
Hacking: The Art of Exploitation, 2nd Edition
by Jon Erickson
- List rank#4
- Price$29.76
- Rating4.6
- Reviews1,607
-
The 30-Minute AI Scam Shield: How Small Business Owners Can Spot Deepfakes, Fake Invoices, and AI Phishing Before They Cost a Fortune
by Ryan Calder
- List rank#5
- Price$9.35
- Reviews-
-
Hacking the Hacker: Learn From the Experts Who Take Down Hackers
by Roger A. Grimes
- List rank#6
- Price$20.69
- Rating4.5
- Reviews203
-
CISM Certified Information Security Manager Study Guide (Sybex Study Guide)
by Mike Chapple
- List rank#7
- Price$39.89
- Rating4.7
- Reviews332
-
Codebreaking: A Practical Guide
by Elonka Dunin
- List rank#8
- Price$20.43
- Rating4.7
- Reviews109
-
Broken Money: Why Our Financial System is Failing Us and How We Can Make it Better
by Lyn Alden
- List rank#9
- Price$9.99
- Rating4.8
- Reviews2,347
-
Internet Security: A Hands-on Approach (Computer & Internet Security)
by Wenliang Du
- List rank#10
- Price$41.93
- Rating4.3
- Reviews42
FAQ
Is Cryptography a good niche for Amazon KDP?
Its KDPTop opportunity score is 35/100, which makes it highly competitive. The median best seller has 47 reviews and sells for $24.99.
How many reviews do you need to rank in Cryptography?
The median best seller has 47 reviews, and 61% of them have fewer than 100.
What do Cryptography best sellers cost?
The median price is $24.99; half of the best sellers are priced between $14.99 and $39.94.
Can new books break into Cryptography?
14% 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.