Mary's thrilled to be invited to a fancy dress party and she has big ideas about the perfect costume. Unfortunately, so does Mary's mother! Mary wants to be "Big Scary Mary" and show everyone her strong, brave side. Her mother isn't sure Mary can manage it and suggests more dainty costumes. Can Mary change her mother's mind before the party? Complemented by whimsical watercolour illustrations, this inspiring and fun rhyming tale celebrates ability, difference, dressing up and fulfilling your potential, no matter who you are.