This month's free eBook from the University of Chicago Press is Revel with a Cause: Liberal Satire in Postwar America, by Stephen E. Kercher. From the publisher's website:
Before there was Jon Stewart, Stephen Colbert, or Bill Maher, there were Mort Sahl, Stan Freberg, and Lenny Bruce—liberal satirists who, through their wry and scabrous comedic routines, waged war against the political ironies, contradictions, and hypocrisies of their times. Revel with a Cause is their story.\
To get your free eBook, go to http://www.press.uchicago.edu/books/freeEbook.html; insert your e-mail address where indicated; and click "Get E-book." Happy reading!
Thank's for posting this, looks like a good read.