I'm looking for an introduction level books on special relativity. My goal is to get familiar with Dirac equation as I'm into atomic physics in this semester. My background on the subject is that I have taken a course in the past which was designed to be kind of introductory to modern physics in general, and a short topic on SR was included..I heard some people recommend A Traveler's Guide to Spacetime for beginners but as I judge from the title and the number of pages this book appears to be really directed for zero background beginners. Do you think this book will really help along with my purpose? If not which books would you suggest? In addition, in which course title do physics student typically encounter and learn Dirac equation for the first time? I'm also thinking that having lecture notes will help me know the majority of contents taught in the subject.