Tickets to the Bookworm Literary Festival went on sale on Saturday. This year's program is impressive for both its diversity of content — two journalism panels, stand-up comedy, art, environment, tech, trivia – and the strength of the visiting authors -- Chang-rae Lee, Yasmina Khadra, Tahar Ben Jelloun, Willis Barnstone, Victoria Hislop, Michael Meyer. Many events will probably go overlooked. They shouldn't be.