Were you always aware that your family had this extraordinary history? Did your father, John, talk about his father? We never had a family meeting where he said: “Right, I’m going to explain to you who your grandfather was.” That was not at all the kind of person he was. But we visited Kim in Moscow and those holidays form some of my earliest memories, so it wasn’t like he was a secret. He was my grandfather, and then as I grew older it became apparent that he was someone else, too. Recently I found a paparazzo shot of my dad with a suitcase getting into a car and me, aged five, looking into the camera, and I had this moment of recognition. That was my dad leaving to go to Kim’s funeral [in 1988] and we were hounded by paparazzi. I remember at the time feeling that something very dark was happening and that I didn’t feel safe.
How easy did you find it to capture Kim’s voice? I spent so long with his letters and they gave me such an insight into the expressions he used, the way he spoke, how he flipped between being tender and reflective and witty and scathing, and his very English obsession with the weather. I love those images of him as a real person; for me, that’s where the clues as to who he really was can be found. A large amount of the letters in the book are lifted verbatim from those.
You’ve written three previous novels about espionage and betrayal – did you need to approach that world obliquely before tackling Kim’s story? I was adamant that I didn’t want to write about Kim because ironically I didn’t want to define myself through his life. But they were quasi-spy novels so I ended up talking about them in relation to his story anyway. I think I’ve spent so long having other people project their versions of my grandfather – and my family – on to me that writing about it is a way of trying to reclaim the story. There are so many ways that Kim’s choices have continued to occupy my mind since my dad died in 2009, but I do feel that this book draws a line under it. I feel as if I have been through some form of therapy, I’ve purged these questions in a way.