E. B. White

If you like sarcasm and often political commentary, you will love 'E. B. White Writings from the New Yorker 1927-1976'. He's an excellent, pithy writer and on top of that it's really interested to watch the evolution of the subject of his writings throughout historical events (ex-McCarthy era stuff is very bold and critical). He writes about other things as well, nature and his hero Thoreau for a few other topics. Check it out all for some good American writing.