In “Royal Sisters”, Anne Edwards, author of the bestselling Vivien Leigh: A Biography and Matriarch: Queen Mary and the House of Windsor, has written the first dual biography of Elizabeth, the princess who was to become Queen, and her younger sister, Margaret, who was to be her subject. From birth to maturity, they were the stuff of which dreams are made. "I'm three and you're four," the future Queen, then a child, imperiously informed her sister....

"As complex in their own way as their Mitford cousins, Winston and Clementine Churchill's daughters each had a unique relationship with their famous father. Rachel Trethewey's biography, The Churchill Sisters, tells their story. Bright, attractive and well-connected, in any other family the Churchill girls - Diana, Sarah, Marigold and Mary - would have shone. But they were not in another family, they were Churchills, and neither they nor anyone else...

"The eldest was a razor-sharp novelist of upper-class manners; the second was loved by John Betjeman; the third was a fascist who married Oswald Mosley; the fourth idolized Hitler and shot herself in the head when Britain declared war on Germany; the fifth was a member of the American Communist Party; the sixth became Duchess of Devonshire. They were the Mitford sisters: Nancy, Pamela, Diana, Unity, Jessica, and Deborah. Born into country-house privilege...