The Kingdom of Altharion is beginning to fracture.

Demons have returned to the borderlands, entire settlements are vanishing, and old rivalries between crown, church, and noble houses threaten to tear the realm apart before the true war has even begun.

When a hardened knight commander and his untested squire are sent to investigate the darkness gathering in the east, they are drawn into a struggle far greater than either expected. Alongside an exiled Aelvar, a dangerous merchant, and the battered survivors of a holy order, they must decide what their vows are truly worth when faith fails, leaders falter, and survival demands more than courage alone.

By Oath and Steel is a character-driven epic fantasy of brotherhood, sacrifice, political betrayal, and the fragile light carried by those who refuse to stand aside.