DEFECTORS by Joseph Kanon, Simon & Schuster.

It’s 1961 and American publisher Simon Weeks is landing at an airport on the outskirts of Moscow. Twelve years ago his older brother Frank defected to the Soviet Union, upending the family and shocking the world. So what will Simon find when he meets him for the first time in more than a decade? A retired spy who wants to publish his memoirs? A penitent with a hankering for home? Or an active agent looking to wreak havoc in the name of communism? Kanon keeps us, and Simon, guessing. Along the way he draws a picture of a community of privileged Western defectors. True believers who are well looked after but never trusted. It’s a tricky milieu, perfect for a story of betrayal and murder. And when family is involved the war may be cold but the blood runs decidedly hot.