Things To Do: March 31 and beyond

today. Kate Atkinson , "Started Early, Took My Dog," 7 p.m. Friday. Gary Vaynerchuk, "The Thank You Economy," 5:30 p.m. Monday. Charles Baxter, "Gryphon: New and Selected Stories," 7 p.m. Monday. Jessica Harper, "The Crabby Cook Cookbook: Recipes and...