The Frankfurt Book Fair opened on Tuesday with a call for togetherness in times of crisis. “Presence helps against polarization,” director Jürgen Boos said at the start of the book show, which is taking place again without social restrictions after two years of pandemic-related disruption. Mapping social developments and tensions, he said, is one of the core tasks of the book industry and the only way to counteract a poisoned debate culture, strengthen democratic discourse and give diversity a stage, he said. The King of Spain, King Felipe VI,and his wife Queen Letizia were also in attendance …