Sunday, July 20, 1pm and 3pm, Spectacle Island Visitor Center Christopher Klein, Discovering the Boston Harbor Islands Monday, July 21, 7pm, Brookline Booksmith @ The Coolidge Corner Theatre Susan Quinn with an introduction by Howard Zinn Furious Improvisations: How the WPA and a Cast of Thousands Made High Art Out of Desperate Times *Tuesday, July 22, 7pm, Porter Square Books Steve Almond Not That You Asked David Blair, Ascension Days Tuesday, July 22, 7pm, Harvard......