I think A Perfect Spy is a nearly perfect book. Only a few of its more than 600 pages are actually about Corfu. If you wanted to write about le Carré and travel, you could go almost anywhere: Vienna or Bern or Kenya or Cornwall would make the list long before Corfu. But as Axel would tell you, if you’re trying to find someone who doesn’t want to be found, you don’t go to the obvious places. You ignore the booked flight to Washington and the train ticket to Paris because you know they’re false leads. You look where the trail is colder.