Timothy Sleep, Naperville City Carillonneur, performs regularly on the Millennium Carillon, Naperville, Illinois and Rockefeller Memorial Chapel, University of Chicago. He also performs guest carillon recitals throughout the country. A retired band director, middle school principal, and long-time church musician, Sleep currently serves as organist at Knox Presbyterian Church in Naperville. Additional free open-air Cook Carillon concerts are scheduled at 8 p.m. each Sunday, through August 19. For more information, please call or visit website.