|H. L. Mencken at his home on Hollins Street (Union Square), in April of 1942, walking under the grape arbor that he built in his garden.|
Why do we still read Henry Louis Mencken? He was mostly a columnist, and columns are usually forgotten the day after they are published. One of the main reasons we still read Mencken is that he was enormously funny. The ability to write humorously about serious things is one of the rarest gifts an author can have.
Mencken also wrote about his own times with great detachment. As a result, many of his quotes still show up and are applicable today. Here's a link to a great collection of Mencken quotes—he had a lot to say about a lot of things:
Quotes from H. L. Mencken