Paris in the Dark struck me as the quintessential literary thriller. It has both fine prose and an intriguing plot, a novel that reminded me of Ken Follett’s earliest work, combining the quiet narration of Alan Furst and gradual tightening suspense of John LeCarré. This is the fourth in Robert Olen Butler’s series of spy novels, putting Christopher Marlowe ‘Kit’ Cobb square in the middle of World War I in Paris. An American journalist by day, Cobb poses as a German-American one by night as he steadily uncovers secrets of…