The images are credited to James Provost, a technical illustrator.

https://jamesprovost.com/

He has a bunch of interviews at https://technicalillustrators.org/ (which he co-founded) but I didn't find an interview of him.

On his blog in 2014 he notes in passing some of the tools he uses. https://jamesprovost.com/blog/surface-pro-3-for-illustrators

This, diagrams and imagery were top notch.