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Ryan Matthews: Amazon KDP author data
As of Nov 6, 2026, Ryan Matthews has 3 books on Amazon, 3 of them on a best-seller list in the last 30 days (best rank #5), mostly in Fluid Dynamics, Mechanical, Chemical.
| Median price | $31.97 |
|---|---|
| Price range (middle 50%) | $30.97 – $34.59 |
| Median reviews | 56 |
| Total reviews | 197 |
| New listings (30 days, incl. new editions) | 2 |
| Breakout books (30 days) | 2 |
What stands out
- Median price $31.97, 42% below the median of their main category, Fluid Dynamics.
Ryan Matthews's best-ranked books
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The Beginner's Guide to DIY Off-Grid Solar Power: The 7-Step Sizing Plan, Real Wiring Diagrams & 4 Complete Builds: Solar Box, Van/RV, Cabin/Tiny Home, Standalone Blackout Backup - Plus a Boat Bridge
by Ryan Matthews
- Price$31.97
- Rating4.8
- Reviews56
- Published2026-08
-
HVAC Made Simple for Beginners: A Visual, Step-by-Step Guide for Anyone Breaking Into the HVAC Trade - Learn to Think Like a Technician, Build Real-World Skills, and Troubleshoot with Confidence
by Ryan Matthews
- Price$37.20
- Rating4.6
- Reviews112
-
EPA 608 Full Exam Prep: Core, Type I-III & Universal in Plain English - Practice Questions, Mock Exams and a 2-Week Plan, Even If You Work Full-Time or You Failed It the First Time
by Ryan Matthews
- Price$29.97
- Rating4.8
- Reviews29
Main categories
FAQ
How many books does Ryan Matthews have on Amazon?
KDPTop tracks 3 of their books; 3 made an Amazon list in the last 30 days.
Which categories does Ryan Matthews publish in?
Their books chart most often in Fluid Dynamics, Mechanical, Chemical.
How does Ryan Matthews price their books?
The median price is $31.97; half of the books cost $30.97–$34.59.
Has Ryan Matthews released new books recently?
2 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.