I will be honest here the book didn't do well enough for me to sustain working on it full time. I will extend this article later to share more details, but for now I want to announce that the online book officially transitioned into side-project status.
I will be working on it, but at a much lower rate than previously. As I settle in my new situation I will estimate more precisely how can I progress with it from now on.
For those who wonder I will be starting as a Senior Frontend Engineer at Snowplow Analytics in just a few days.