I'd highly recommend anything by Andreas Antonopoulos. I started looking into crypto (specifically Bitcoin) in September, although I didn't buy any as I wanted to understand it first. Looking at the price now it may have been foolish not to buy some but hindsight is a wonderful thing and I guess knowledge is far better than if I'd dived in and made a mistake so I'm not bitter lol.

But seriously, have a watch of Andreas Antonopoulos YouTube videos where he does talks on Bitcoin. I find the underlying technology and the passion he clearly has around Bitcoin far, far beyond making money to be absolutely mesmerising. This guy is all about what Bitcoin can do for the world and explains it and the background in very easy way to understand. You might also want to look up the Joe Rogan podcasts where Joe spoke to Andreas. Seems to be even more simple watching those and in my opinion absolutely fascinating.

Bookwise you can go wrong with Master Bitcoin which is free reading it from the GitHub - https://github.com/bitcoinbook/bitcoinbook