Came across this free e-book during my interwebz studies put out by the Bellingham Technical College Instrumentation and Control program, great combo of theoretical and practical with plenty of detailed color drawings and photos. Very relevant to our work.
Lessons in Industrial Instrumentation textbook
It’s right at the top of the page. Just click on where it says Version 2.24 (stable): [PDF], it will take a while to load as it’s over 2k pages. When it opens you can just save it as a PDF.