I'm still using 9 and I'll wait for Apple to release a better LPX version than the actual before upgrading. Since the new Mac Pro comes out tomorrow, maybe we'll have some good news about LPX 10.1 soon. Let's hope so!
In the meantime, You've certainly encountered some of the numerous bugs present in LPX during the making of your book. Do you talk about them and give the reader some workarounds? Wasn't it a bit premature to publish a book about LPX since the actual version is known to be very buggy in many aspects?
Logic Pro 10.6.3, 10.5.1, MacOs Catalina 10.15.7, 2012 iMac 27" 3.4 GHz i7, 1TB HD W/ Fusion drive, 8 GB ram, MacBook Pro Early 2015 (Retina, 13-inch), Behringer X-Touch, Focusrite Saffire Le w/ thunderbolt adapter - > firewire 800/400 cable, Korg nanokontrol2, Korg MicroKey 27, Alesis VI61