@crackurbones thats so hard, gonna have to go with Fundamentals of Electric Circuits by Charles Alexander. Mostly because I still remember reading it and it was the first time in my life AC/RF electronics design finally made sense and I was struggling to learn it for years before that from simpler approaches.

@crackurbones

Modern Compressible Flow by John D. Anderson. It's a very useful reference, and as always Anderson pays attention to the details - e.g. under what circumstances each model accurately represents reality.