Richard C. Longworth, author of "Caught in the Middle", will be the keynote speaker for a February 23rd symposium, a joint effort by Sauk Valley Community College and Sauk Valley Media.   The public is invited...free admission.  A meet-and-greet reception with the author is planned for 5:30 pm in Sauk's East Mall.  At 6:30 pm, Longworth will deliver the keynote address in the Jerry Mathis Theater, which is adjacent to the East Mall.