"The Blue Sword" is a fantasy novel by Robin McKinley, published in 1982. The story follows Harry Crewe, a young woman who is transported to the desert land of Damar after her family moves there. In Damar, she discovers her unique abilities and becomes involved with the local people, particularly the Hillfolk. As Harry learns about her new surroundings, she is drawn into a conflict against the oppressive forces threatening Damar. The novel explores themes of identity, belonging, and the struggle between different cultures, ultimately highlighting Harry's journey to embrace her destiny and powers.