This is a novel which changed its nature, content and significance from when I started research until publication. Right up until the last stage of copy editing I was revising and adding material and characters to this dark story. I started it, thinking that it would be a relatively simple telling of the tragic story of Margaret Pole – daughter of George Duke of Clarence and Isabel Neville. George was the brother of Edward IV, probably drowned in a vat of Malmsey wine for treason against Edward and Queen Elizabeth. As the book progressed I discovered that Margaret was a central figure in the Tudor court, and probably actively involved in the endless conspiracies against Henry VIII and his advisors. This hidden rebellion reached its peak in the uprising of the North called the Pilgrimage of Grace. The pilgrims won their aims of defending the Roman Catholic traditions and the return of the traditional advisors, but Henry reneged on his promises and sent his troops for a terrible persecution to men who held a royal pardon. Margaret, and her entire family, came under suspicion too and this novel moved far from the template of a persecuted heroine and became the story of a merciless murder of a family. Margaret's betrayer, and her defenders all come under the gaze of a king who was increasingly frightened and, I believe delusional. It's been a chilling and powerful book to write and the image of Henry VIII, composer of 'Greensleeves' beloved of primary school history, will never be the same again for me. He was a serial killer and this book traces his steps towards psychosis.