Reddit mentions of Electronics: A Systems Approach (4th Edition)

I would recommend Neil Storeys A Systems Approach.

This book is very well described, and was practically the baseline reference for all modules across first year digital and analog electronic modules, and some second year (BJTs, MOSFETs, FETs, Darlingtons, transconductance etc.)

(Un)fortunately to understand means a lot of reading, maths and experiments. Electronics is a practical subject and is the best way to learn. I would personally choose a DIY circuit, then read on the components, and their configurations i.e. RC, DC Couplers, potential dividers, negative feedback amps etc.

I am a huge fan of Electronics: A Systems Approach by Neil Storey. It has chapters on a wide range of subjects, with very practical and useful information, applicable to both analog and digital systems but also general principles of engineering. It was a 'must have' book to have during my EE studies according to my teachers and I must say they weren't wrong, I must have opened it atleast once for every course I followed.

It's not too expensive: https://www.amazon.co.uk/Electronics-Approach-Dr-Neil-Storey/dp/0273719181