I was passing through Newark, New Jersey, in 2002 when I picked up a paperback thriller in the airport bookstore. It was by Robert B. Parker, a writer I had never heard of, and I can’t remember what attracted me to it: almost certainly its portability and low price. I was at that time the New York correspondent of the Daily Telegraph. My beat was everywhere east of the Rockies, and I frequently took short-hop flights to cover stories. A banker had absconded with a bunch of cash in Baltimore; a stripper had been elected mayor in a small conservative town in Colorado; there was a videogame convention in Chicago – and I hopped on a plane.