I'm not sure that Feynman is "without too much math."
Try Nobel prize winner Max Born's "Einstein's Theory of Relativity", which presents a largely descriptive and rather non-mathematical description of mechanics, optics and E&M using nothing more than high-school algebra. There are many diagrams, and he manages to explain Maxwell's equations in an intuitive way. You'll also get descriptive tutorials on special (and a little bit of general) relativity.