Leave to Remain is a faux spy-novel possessed by the spirit of Janus: doubleness, duplicity, double-entendres, two-facedness, bridges and doorways--as is only appropriate for a work composed by two writers: one French, one American. Two-faced Janus resurrects into a time-traveling adventure, a tour of double-agents, double-speak, and double-dealings. In their earlier hybrid essay, A Prank of Georges (2010), Thalia Field...