Electrical engineer turned software engineer, here. The Art of Electronics by Horowitz and Hill has a permanent place on my desk. It is quite simply the bible

Electrical engineer turned software engineer, here. The Art of Electronics by Horowitz and Hill has a permanent place on my desk. It is quite simply the bible of electronics engineering, the EE analogue of the famed Machinery’s Handbook. I also recommend Signals and Systems by Oppenheim for any aspiring EE.