My problem with learning electronics, and, to a lesser extent, electricity, was that most of the guides gave an 'ad-hoc' approach, giving "rules of thumb", recipes, etc. without really going into the reasons for it. They would start off with an (imo) overly technical explanation of quantum effects, then jump the more fundamental Ohm's law, etc., then jump into all the tips-n-tricks of circuit design.
For me, the two major factors to learning electronics were getting enough math sophistication that I could do calculus and linear algebra and being able to program (microcontrollers). The calculus and linear algebra gives tools for the 'passive' analysis and once you realize that most 'practical' electronics nowadays are basically routing power and signal, being able to program is the "meat" of it.
After understanding how to do passive steady-state circuit analysis, I briefly looked at how to do non-passive simulation (transistors, etc.) just to see how it was done (aka, learned how SPICE et. all do it).
Anyway, I found the "Practical Electronics for Inventors" book to be one of the few books that was practical from the outset and actually went into the theory, even if only briefly, without assuming I would get frightened by complex numbers.
There's obviously a path that doesn't involve calculus, linear algebra and programming, because people do it and have been doing it for many years, but these were the tools that helped me understand.
I would also recommend not doing this in the abstract. Arduino's  are, in my opinion, one of the better places to start. You can get an LED blinking within 5 minutes of onboxing. Adafruit  has many tutorial but they're more focused on using pre-built modules and I guess programming, to a lesser extent, than underlying theory.
- Albert's Molecular Biology of the cell - https://www.amazon.com/dp/0815344325/ref=dp-kindle-redirect?... - It introduces basic Biochemistry, a lot of Genetics and Gene-regulation and Developmental biology. The book also touches other areas (but very vaguely) like Immunology... I think if you read this book you will be able to understand modern Molecular Biology papers.
- Biochem: Legninger's Principles of Biochemistry https://www.amazon.com/dp/B01K0PYUYQ/ref=dp-kindle-redirect?... - Our prof taught us from this, it has great visuals and covers a lot of areas.
- Developmental biology: Gilbert's - https://www.amazon.com/Developmental-Biology-Tenth-Scott-Gil... - it introduces more genetic regulation and development for all walks of life
- Human developmental biology: Bruce M. Carlson - Human Embryology and Developmental biology - https://www.amazon.com/Human-Embryology-Developmental-Biolog... - Again it's the choice of my prof, but I loved it, great images and visual explanations.
- Anatomy: I'd definitely go for anything by Netter -> https://www.amazon.com/Atlas-Human-Anatomy-Netter-Science/dp...
- Cancer: Robert A. Weinberg - The biology of cancer - https://www.amazon.com/Biology-Cancer-2nd-Robert-Weinberg/dp...
- Plant biochem: Biochemistry and Molecular Biology of Plants - https://www.amazon.com/Biochemistry-Molecular-Biology-Plants... - A very good book with great illustrations.
For electronics and Embedded:
- Art of Electronics by Paul Horovitz - https://www.amazon.com/Art-Electronics-Paul-Horowitz-ebook/d... - I saw that others also suggested it, great book
- Paul Scherz - Practical Electronics for inventors - https://www.amazon.com/Practical-Electronics-Inventors-Fourt... - I was introduced to electronics via this book. Not really a textbook but it's I think it's a great book to get started, it covers almost the same topics as the Art of Electronics but not as deep and with better visual explanations.
- Embedded systems - Michael Barr - Programming Embedded Systems in C and C++ - I was introduced to embedded software development by this book, when I was working for an IoT company and only had experience with systems and web programming.
Programming (my cherry picked favourites):
- Hacking: The Art of Exploitation - I love this book. I've read it after I had a few years of professional programming experience with C#. It introduces programming via C, also every example program is disassembled with GDB. It gives the reader an intuition of how C code compiled and what happens on the register level.
- C in a Nutshell: The Definitive Reference - Usually when you search for good books to learn C from, you get titles like The C programming language, Deep C Secret. But I think C in a Nutshell beats all other C books. (Especially when you read it together with C related chapters from The Art of Exploitation).
- Functional Programming in Scala - https://www.amazon.com/Concurrency-Go-Tools-Techniques-Devel... - I love the Go language and how it handles concurrency. This book does a great job of describing how the go runtime works, and does a great job explaining concurrency in general. Also there are a lot of good design patters in it.
- Professor Frisby's Mostly Adequate Guide to Functional Programming - https://www.amazon.com/dp/9332573905/ref=dp-kindle-redirect?... - This was the suggested textbook for https://courses.cs.washington.edu/courses/cse351/ that was also available on Coursera. Great book.
$FREE = Lessons In Electric Circuits - 6 PDF books, 2700 pages.
$FREE = Electricity & Electronics Training - many older modules, scroll down for links to other modules.
$FREE = Engineer's Mini Notebooks - many older booklets.
$20 = Make - Electronics , 2nd edition, 2015.
$30 = Make - More Electronics , 1st edition, 2014.
$21 = Practical Electronics for Inventors , 4th edition, 2016.
$23 = Complete Electronics Self-Teaching Guide with Projects , 4th edition, 2012.
$97 = The Art of Electronics , 3rd edition, 2015. The 2nd edition is great too.
I think this is very helpful.
It's a fun hobby. Biggest learning curve is learning how to code. I didnt know a thing when I first started but the arduino community (link below) is really helpful with the process. They will even go over code you've written if your having issues.
Arduino community forum:
Book for learning arduino program language:
A good starter kit. Comes with alot of goodies like the program used to write the code and compile it, the arduino itself, super sonic sensor, DC motors to name a few as well as data sheets for each piece:
Book recommended to me that helps with the more complex builds: https://toptalkedbooks.com/amzn/1259587541
My first project I made/wrote was to make a couple LEDs blink in specific intervals. May not seem like much but like I said, biggest learning curve is learning to program the arduino itself.
Electrosmash has some great analysis articles is a good book that covers fundamentals with common examples.
If you want to get a good overview of AC and DC beyond wiring circuit breakers and light switches.
Practical Electronics for Inventors is a really good book to get started with this sort of stuff: https://www.amazon.co.uk/Practical-Electronics-Inventors-Fou...Once you realise that under the modules there's the same MOSFET input stages, MOSFET output stages, diodes and voltages that you get in discrete electronics, it all becomes pretty clear how to make things talk and interact.
Once you realise that under the modules there's the same MOSFET input stages, MOSFET output stages, diodes and voltages that you get in discrete electronics, it all becomes pretty clear how to make things talk and interact.
Paul Scherz & Dr. Simon Monk's "Practical Electronics for Inventors, Fourth Edition" 
Going to throw another book in the ring. I generally recommend this book for people getting started, because it teaches them how to solve specific problems with real examples. The theoretical side of electronics can be quite daunting because of the sheer number of concepts and understanding of mathematics that are required.
Practical Electronics for Inventors covers a large number of important circuit/electronic concepts but grounds them in real world application. Perfect for getting your hands dirty while learning the most pragmatic aspects of electronic theory.