I found Fundamentals of Computer Graphics by Peter Shirley to be a great intro book. Yes, it's a textbook, but it's one of the better written ones. I like that

I found Fundamentals of Computer Graphics by Peter Shirley to be a great intro book. Yes, it's a textbook, but it's one of the better written ones. I like that it also teaches you how to code the algorithms, not just the math behind them. It's not OpenGL-focused though.