The board and components illustration, and the starter book are simple, clear and beautiful.
I'm wondering how you have achieved such impressive result as I would like to offer the same level of quality for educational and tutorial books/webpage for our arduino-based projects.
Can you tell me which software do you use for your components illustrations and the page layout of your books?
Thanks for the hint, yet we have a custom board (fork of Due) made with KiCad.
It is not clear for me if is it possible to create a custom board illustration with Fritzing or if it only embed the official ones ?