A book on punctuation on the NYTimes best seller list? Believe it, the book is that good. If you need a go-to reference book on all things commas, periods and semi-colons, Eats, Shoots and Leaves: The Zero Tolerance Approach to Punctuation by Lynn Truss is your guide. As you’re proofing your essays, double checking grammar, punctuation (and more) is a must. The only downside–it’s hardcopy only, no e-book version available.