The Great American Tour de Nerdfighting, featuring John and Hank Green, will present a program at 2 p.m. Nov. 16 at the Ames City Auditorium, 520 6th St. John is the author of “Looking for Alaska,” “An Abundance of Katherines” and “Paper Town.” Hank is the founder of ecogeek. The two are vlogbrothers and have a popular channel on YouTube. The Little Bookroom will provide books to purchase and have signed. The event is free and open to the public.