August in Paris calls for homemade lemonade, cold salads and wide-open windows, our flat breathing in fresh air. After a few somber reads, I needed a change in my reading life and picked up a feel-good novel, The Flatshare by Beth O’Leary. Living in a big city can call for some odd behaviors: on-demand dog walking, avoiding eye contact in public, or as O’Leary imagines, and a bedshare. Yes, readers, a bedshare.