Reading mystery/thrillers is a guilty pleasure; for me, plot is less important than context. Two factors distinguish Le Carre’s novels. First, the writing is much better than most mystery writers. Here is a description of Ireland: “The day had been sullen and damp, an evening that began at breakfast”. And second, Le Carre’s plots are sublime in their complexity. In this novel, someone infiltrates a drug/arms dealer’s entourage so lots of danger and suspicion; the complementary plot of political intrigue for the spymasters is wonderfully suspenseful (really, who are the good guys and who are the villains). This is a very entertaining book which was made into a TV mini-series a few years ago.