Fonda Lee returns to the acclaimed Green Bone Saga with four prequel short stories that delve into the personal histories of the Kaul and Ayt families.

On a mountainside at the edge of the Kaigenese Empire live the most powerful warriors in the world, superhumans capable of raising the sea and wielding blades of ice. For hundreds of years, the fighters of the Kusanagi Peninsula have held the Empire's enemies at bay, earning their frozen spit of land the name "The Sword of Kaigen". Born into Kusanagi's legendary Matsuda family, f14-year-old Mamoru has always known his purpose: To master his family's fighting techniques and defend his homeland.

The Catenan Republic—the Hierarchy—may rule the world now, but they do not know everything. I tell them my name is Vis Telimus. I tell them I was orphaned after a tragic accident three years ago, and that good fortune alone has led to my acceptance into their most prestigious school. I tell them that once I graduate, I will gladly join the rest of civilized society in allowing my strength, my drive, and my focus—what they call Will—to be leeched away and added to the power of those above me, as millions already do. As all must eventually do.

Darrow is a Red, a member of the lowest caste in the color-coded society of the future. Like his fellow Reds, he works all day, believing that he and his people are making the surface of Mars livable for future generations. Yet he toils willingly, trusting that his blood and sweat will one day result in a better world for his children. But Darrow and his kind have been betrayed. Soon he discovers that humanity reached the surface generations ago. Vast cities and lush wilds spread across the planet. Darrow—and Reds like him—are nothing more than slaves to a decadent ruling class.

Epheria is a land divided by war and mistrust. The High Lords of the South squabble and fight, only kept in check by the Dragonguard, traitors of a time long past, who serve the empire of the North. In the remote villages of Southern Epheria, still reeling from the tragic loss of his brother, Calen Bryer prepares for The Proving - a test of courage and skill that not all survive. But when three strangers arrive in the village of Milltown, with a secret they are willing to die for, Calen’s world is ripped from under him and he is thrust headfirst into a war.