Introducing Relativity: A Graphic Guide

Science communication of this level of physics is an odd niche. This isn't a textbook, which a college class would work from. And it's not a science popularizing book, like Brian Greene's, which are for laypeople to get a good feel for the topic. Instead it's a pretty slim volume that doesn't try to get into the nitty-gritty too much (not many equations and no practice problems). I think it would be a good read/gift for someone who's an undergrad physics major, since they already have a lot of the pieces this book assumes, but don't have all of them.