And here's another one. It introduces maze building ideas in a simple way.

http://www.jamisbuck.org/presentations/rubyconf2011/index.ht...

I used that book to design mazes that were rendered as thick-walled SVGs so I could make them out of plywood on my laser cutter!

https://photos.app.goo.gl/UwSmp9mjWw4asBcZA