I just bought that book last night. Coincidentally at a Barnes and Noble. Might not get a chance to start reading it until my Christmas vacation though.

I do have a couple of Richard Binder's books and recently got a copy of Pen Repair Fourth Edition which has a large amount of good info in it. I have also been finding several YouTube channels that have good repair/restoration videos.

I am just getting into the restoration part of the hobby. So far I have just been doing teardowns and cleaning and ink sac replacement. Have not started learning any of the more complicated repairs yet, but I have a good sized collection of parts pens to learn on.

Did you have to side load the app, or did it install through the play store for you? I recently got the Boox Note Air 4C and the Google Play store says that the BlueSky app is not compatible.

Congrats. I have just finished reading my fifth one for the year. Feeling so much better for having done it.