Dawn Obrecht discusses and signs her book about recovery from addiction, From the Edge of the Cliff, from 4 to 5 p.m., Friday, Nov. 16. Geoff Rod signs his mystery novel Denver Nights, from noon to 1 p.m.; Donna Grisanti signs her book Wandering Hearts from 1 to 2 p.m.; and Deborah Knox discusses and signs her Put Your Spirit to Work from 1 to 2:30 p.m., Saturday, Nov. 17; free.