KDP categories · Top KDP authors
Ryan Calder: Amazon KDP author data
As of Nov 6, 2026, Ryan Calder has 4 books on Amazon, 4 of them on a best-seller list in the last 30 days (best rank #2), mostly in Computers & Technology, Business Development & Entrepreneurship, Small Business.
| Median price | $9.35 |
|---|---|
| Price range (middle 50%) | $8.88 – $9.35 |
| Median reviews | - |
| Total reviews | 0 |
| New books (30 days) | 4 |
| Breakout books (30 days) | 2 |
What stands out
- Median price $9.35, 51% below the median of their main category, Computers & Technology.
- 4 new books in the last 30 days, 2 of them broke into a Best Sellers list.
Ryan Calder's best-ranked books
-
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
- Price$9.35
- Reviews-
- Published2026-10
-
The 30-Minute AI Back Office: How Small Business Owners Use AI to Handle Email, Paperwork, and Admin Without Hiring Help
by Ryan Calder
- Price$9.35
- Reviews-
-
The 30-Minute AI Social Media Day: How Busy Business Owners Use AI to Post, Grow, and Sell Without Living Online
by Ryan Calder
- Price$9.35
- Reviews-
- Published2026-10
-
A Brief History of Skateboarding: How a Sidewalk Toy Became a Culture
by Ryan Calder
- Price$7.49
- Reviews-
Main categories
FAQ
How many books does Ryan Calder have on Amazon?
KDPTop tracks 4 of their books; 4 made an Amazon list in the last 30 days.
Which categories does Ryan Calder publish in?
Their books chart most often in Computers & Technology, Business Development & Entrepreneurship, Small Business.
How does Ryan Calder price their books?
The median price is $9.35; half of the books cost $8.88–$9.35.
Has Ryan Calder released new books recently?
4 new books in the last 30 days, 2 of which reached a Best Sellers list.
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.