Read this one. Easy read and covers the basics. After reading this I know the terms and basics of nutrition fluids and so on.
The two best books I’ve read on the subject of hydroponics are Hydroponic Food Production by Resh and a recently published book titled Plant Factory edited/written by Toyoki Kozai and others.
I’ve also found the subject of biostimulants (omino acids, kelp, humic/fulvic acids, silica, etc) understandable by Harley Smith. I haven’t read his book, but I’ve spent plenty of time reading his published articles.
those books looks great, will have a look at it