Obsessed by what they are certain is the impending apocalypse, a mismatched trio sets off on a globe-trotting road trip in the latest feel-good adventure from the internationally bestselling author of The 100-Year-Old Man Who Climbed Out the Window and DisappearedIn the fading days of summer 2011, self-taught astrophysicist Petra has calculated that the atmosphere will collapse in a few weeks’ time—on September 21, at approximately 9:20 p.m.—ending the world as we know it.But