No worries, man. But you're always welcome. The FreeCAD world is growing in lots of directions so there's always room for guyz with skillz.
The economics of printed tech books is really tough. My publisher, Purple Squirrel, has been looking at a Print-On-Demand option and it looks like that will eventually happen. I also want to update the book for 0.19. Most of the book is still completely relevant but the new Part::Links need to be discussed. Maybe @normand would consider coming out of retirement long enough to review it?
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.