Cross, the author of NYT bestsellers, will discuss and sign her latest book “In Light of All Darkness,” a deeply reported story about the Polly Klaas kidnapping that triggered one of the largest manhunts in FBI history and transformed the bureau’s approach to solving crimes. Cross’s talk is at 6 p.m. on Wednesday, January 8, at Fire Hall No. 2, 489 Prince Avenue, Athens, Georgia. The event is free and open to the public.