"I went to the tunnel at first light every morning to arrange the trash. The trap shouldn't be repulsive but appealing. A warm call in a hostile place. I wanted to make a path from the exterior to the interior in two steps: an inviting mirror at the entrance and an absent monster at the end of the tunnel. But this absence was problematic. The back wall couldn't simply be left blank even if it was full of spiders. I had to stress her presence with something bigger, silent and still, but alive. Maybe a toxic plant that grows from the tunnel ground and extends her roots over the entire area. Her victims would be nothing but compost. But that wasn't my idea, it was Ruth Rendell's."