Goodreads asked Fil Reid:

Where did you get the idea for your most recent book?

Fil Reid On a grey, wintry day, my husband and I parked our Land Rover round the back (where Gwen’s parents park in the book) and walked across the field towards the Tor. My husband set up his tripod and camera, loaded with infrared film. He took four very rapid photos. When he developed the film that evening he was shocked. Photo 1 – you can see the tower on top of the Tor clearly. Photo 2 – the tower is fading. Photo 3 – the tower has completely vanished. Photo 4 – the tower is back. Although the day was grey, visibility was fine. Infrared film is super sensitive and he had NOT messed with it. This set me wondering if we’d had a glimpse back in time to when the tower wasn’t on the hilltop, and what would have happened if we’d been up there, in it, when it vanished. I mulled it around for a long while in my head, combined it with the story I’d always wanted to write about Arthur from Guinevere’s POV, and then one day just sat down and wrote it. Guinevere was born.

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