What is the title of Book Two of The Legend of Korra?

The title of Book Two of The Legend of Korra is “Spirits.” It is the second season of the series and follows Book One: Air.

Book Two: Spirits shifts the story from Republic City toward the Southern Water Tribe and the spirit world. Korra’s uncle Unalaq, chief of the Northern Water Tribe, becomes involved in the political conflict between the Northern and Southern tribes. His influence also pushes Korra to investigate the increasingly troubled relationship between humans and spirits.

The season contains a major historical revelation in “Beginnings,” a two-part story about Wan, the first Avatar, and Raava, the spirit of light and peace. “Change” is the title of Book Three, while “Balance” is Book Four, so those options belong to later seasons. “Water” is associated with Korra’s native element and the world’s elemental mythology, but it is not the title of any Korra book.