Why was an English lawyer shot dead in Turkey by his firm's top client? How can a down-at-heel magician in Devon explain the vast fortune that has mysteriously appeared in his daughter's trust fund? With customs officer Nat Brock on the trail, the answers point to the House of Single - once a respectable finance company, now entangled with a Russian crime syndicate. West is pitted against East, and the British establishment against a labyrinthine criminal superpower, in le Carre's searing novel of lives built upon lies.