“Nauset Waves,” an exhibit by Cape Cod photographer John Tunney, features impressionistic, abstract and traditional images of the rolling waters off Nauset Beach. It will be on display in the library’s Craine Room through the month of May. A reception to meet the artist will be held on Saturday, May 6, from 11 a.m. to 1 p.m. Refreshments will be available, and pianist Jessica Lamperti will perform. All are welcome.