From the blurb on the back: Into the treacherous Tudor court walks Hannah Green, a bookseller's daughter with a gift to read more than banned books. Entangled in the schemes of the handsome traitor Robert Dudley, she is sent as a Holy Fool to spy on Princess Mary and finds a complex woman driven by a fatal desire to turn England back to the true faith - while her half-sister Elizabeth waits to take advantage of any mistake she makes. Caught in the deadly rivalry between the daughters of Henry VIII, torn between her infatuation with Dudley and duty to her family, Hannah must find a safe way through tumultuous times - when the wrong religion is a death sentence, science and magic are one, and true love is a fatal weakness.