1632 by Eric Flint - it became a series. I can read them over and over. - Alternate history, contemplative of everything that makes modern civilization possible and keeps it going.
The Art of Electronics - Horowitz and Hill - All the nitty gritty details you'll need if you're to be a good electronics designer
The adolescence of P-1 - Thomas Joseph Ryan - Introduced me to the idea of random walks leading to AI.
Computer Lib/Dream Machines - Ted Nelson -- Quite a bit of ideas about computers, I read it decades ago.
Diary of an Early American Boy: Noah Blake 1805 -- By Eric Sloane -- Early Americans really knew their shit, we tend to think of them as simpler people, this book dispelled me of that stupid notion.
Boys Second Book of Electronics - Alfred Morgan, 1957 -- Introduced me to the idea that I could make my own radio or anything electronic I wanted to make.