- Verhoeven, John. Metallurgy of Steel for Bladesmiths & Others who Heat Treat and Forge Steel.
- Verhoeven, John. Steel metallurgy for the Non Metallurgist.
3. Thomas, Larrin. http://knifesteelnerds.com
Larrin is the son of Devin Thomas. A metallurgist who is collating information specifically for blade makers. He will be one of the knowledge sources for the generation that is coming. I think he accepts Patreon sponsors. His stuff is readable (he knows his audience). He kills myths.