Jane and Cassandra Austen were the closest of sisters from early childhood. Cassandra was the most important person in Jane’s life; Jane looked up to and adored her older sister, who was devoted to her in return. As well as sharing the same education, interests, friends and Christian faith, the inseparable sisters supported each other through various emotional crises and family troubles. Most importantly, Cassandra, who was privy to Jane’s imaginary world, supported and encouraged her in her writing. The Austen Girls explores the lives of the Austen sisters and traces their relationship throughout Jane’s life and literary career, until Jane’s premature death at the age of forty-one. It also follows Cassandra’s life after the loss of her sister.