The granddaughter of Henry VII, niece of Henry VIII and grandmother of James VI, Lady Margaret Douglas (1515-1578) was an important figure in Tudor England, yet despite modern interest in that era she is largely forgotten. Alison Weir focuses on this shadowy figure whose life spanned five reigns and whose political intriguing landed her in the Tower three times, and in this biography reveals a strong, intelligent woman who 'operated effectively, and fearlessly, at the very highest levels of power'.