FRIDAY, MAY 24 On the town Two novelists: Pulitzer Prize-winning novelist Adam Johnson (“The Orphan Master’s Son”) appears in conversation with novelist Anthony Marra (“A Constellation of Vital Phenomena”). [7:30 p.m., Booksmith, 1644 Haight St., S.F.] SATURDAY, MAY 25 A great hike ‘Floral Finder’: We’re at the end of wildflower season, but don’t tell Ring Mountain that. Read More