A couple of years ago, Lee Child’s Jack Reacher thrillers were statistically certified, by Forbes magazine, as the most addictive novels in commercial fiction. The key finding was that ‘Child carries more readers with him from book to book than any other bestselling author.’ Perhaps I’m too weak-kneed to be a proper Reacher fan: the ones I’ve read I found hard to put down, but I didn’t feel compelled to go out and buy the lot. The airport-thriller page counts and twitchy plotting sometimes left me feeling jangled and strung out, as though I’d been bingeing on espressos and Haribo Tangfastics while playing a frenetic computer game. That wasn’t the case with another series about a laconic tough guy with a name ending in ‘-er’, a series that’s put together with more artistry than you’d expect and which has, for me, greater addictive properties: the Parker novels by Richard Stark, a pseudonym of Donald Westlake (1933-2008).