They were the closest of sisters and the best of friends. But when their uncle Edward Vlll decided to abdicate the throne, the dynamic between Elizabeth and Margaret was dramatically altered. Elizabeth would always look upon her younger sister's antics with a kind of stoical amusement, but Margaret's struggle to find a place and position inside the royal system --- and her fraught relationship with its expectations --- was often a source of tension. From the idyll of their cloistered early life, through their hidden wartime lives, into the divergent paths they took following their father's death and Elizabeth's ascension to the throne, Andrew Morton's book explores their relationship over the years.