The American language
This groundbreaking study clarifies the differences between British and American English and defines the distinguishing characteristics of American English. Cigar-chomping newspaperman H. L. Mencken succeeds not only in providing a lucid description of the American language but also in making his readers laugh, wince, and nod in agreement. It's a readable and fascinating study on why you say "tomayto" and I say "tomahto." A must read for anyone who loves words.