I've written four historical novels before taking this leap into writing a thriller – a change I'm alternately excited and nervous about! This is a story about sisters and secrets, and I write a Substack featuring sisters in history and fiction called Sis-Stories. I am a sister, although I don't have a sister, so maybe I'm making up for something missing?? The jury is out on that, but I do know sister stories are fascinating to read and write about.