Also is your goal to learn enough to get a job?
Engineering Manual of Automatic Control for Commercial Buildings (Honeywell, 1997)
Inch-Pound Edition: https://customer.honeywell.com/resources/techlit/TechLitDocu...
SI Edition: https://customer.honeywell.com/resources/techlit/TechLitDocu...
Feedback Systems: An Introduction for Scientists and Engineers
https://fbswiki.org/wiki/index.php/Feedback_Systems:_An_Intr...
Instrumentation and Control (U.S. Department of Energy)
https://sites.ntc.doe.gov/partners/tr/Training%20Textbooks/F...
(This is part of a series for nuclear plant operators, but the basic principles are equally applicable in many other fields.)
https://stevenengineering.com/Tech_Support/PDFs/09EA08-2.pdf