6+ day, 21+ hour ago  (231+ words) Sonoma Valley Authors Festival headliner Maria Semple's latest book, "Go Gentle," has been named as Oprah Winfrey's 122nd must-read recommendation. Semple will speak to festival attendees at the free "Authors on the Plaza event from 11 a. m. to" 2 p. m. May 2, alongside fellow authors Dave…...