The Sisterhood collection: Independent. Irrepressible. Unforgettable. A stunning boxset of inspiring books from the very best female writers. The Sisterhood collection was published to mark International Women's Day, a global event that recognizes the social, political and cultural achievements of women. Starring some of the moost beloved female heroes ever created, these time-honoured stories have given generations of girls and young women courage, companionship and hope.