If you are a student or anyone who writes professionally in the political sciences, I HIGHLY recommend the purchase and use of this book. I added notated tabs on the side of mine, so that I could quickly reference the sections I found myself using most often (or the the tools of writing I used often that I wanted to refer back to in the CMS). It is a slightly more expensive book purchase, to be sure, but worth every single penny. Clear. Concise. And most of all, easy to use. I am in love with the Chicago Manual of Style, and I'm not ashamed to say it!