Last night for fun, I made a little clock that was powered by lemons with my son. While doing it, I realized that I don't know if I'd be able to create a chemical battery that could potentially charge a phone, or something more power-demanding than a tiny clock. Of course, this realization sent me down the rabbit hole of self-loathing for my own ignorance, culminating with me rocking myself in the corner while my wife tried to coax me out with chocolate.
What have you found to be the most comprehensive survival book? Hoping for something that contains the likes of basic chemistry, engineering, etc.
Thanks,
Stu