Hi,
I was (and still am) very interested in this book as I really would like to program my own game. But seeing as this project is somehow dead and I don't want to wait any longer with development of my game , I looked for alternatives. And there's one available on itch.io called "Game Development with PICO-8" which I now will use instead of "How to make games ...":
https://mboffin.itch.io/gamedev-with-pico-8-issue1
Maybe it's helpful for others as well.
Greetings,
Telespieler