The public library has launched “100 Authors in 1 Year” , a commitment to host talks by 100 different authors in 2013. Library officials said the program will feature fiction and nonfiction writers, from best-selling and award-winning authors to local and undiscovered ones. All talks will be free. The initiative is sponsored by the Friends of the Tewksbury Public Library. Meanwhile, the library is presenting its first “Star Wars Symposium” Saturday, from 10 a.m. to noon. The event will include speakers, trivia, show and tell, contests, and photo opportunities with costumed characters. All children under 10 must be accompanied by an adult.