HomeLab & Selfhosting Books

I've read 'The Home Lab Handbook: Building and Managing Your Own IT Lab from Scratch' which I would recommend to anyone just starting out in selfhosting and homelabing. Relative to that, I found a 'course' online (https://linuxupskillchallenge.org/#table-of-contents) that would also be useful for new arrivals.

Anyone reading any good HomeLab & Selfhosting books lately?