Books: Author Richard Doster speaks, 7:15 p.m., Decatur Library Auditorium, Decatur. FREE.

For families: “Under the Sea” IMAX film, 1 p.m., Fernbank Museum of Natural History, Atlanta.

Music: Jason Mraz performs, 7 p.m., Verizon Wireless Ampitheatre at Encore Park, Alpharetta.

Music: M. Ward performs with The Moaners, 9 p.m., 40 Watt Club, Athens.

Music: Chanda Leigh performs as part of the National Black Arts Festival, 7:30 p.m., Southwest Arts Center, Atlanta. FREE.

Outdoors: Night Hike, 8 p.m., Gwinnett Environmental and Heritage Center, Buford.

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