New York Times best-selling author and memoirist Mary Karr will present a candid account of her writing and personal battle with alcohol — as a college student, wife and mother — at 7 p.m., Tuesday in the Performing Arts Center of Georgia Southern. The event is free and open to the public. Karr will share excerpts from her latest best-selling memoir, “Lit,” which chronicles her own experiences with addiction, recovery, relapse, faith and the 20-year road to sobriety.