The Mystery Knight by George R. R. Martin

A gruff hedge knight and his clever young squire travel to a lordly tourney where a cloaked “mystery knight” upends the contests, and what begins as revelry soon reveals a dangerous web of political intrigue tied to lingering factions and a potential pretender; navigating cramped halls, secret meetings and bloody confrontations, the knight must rely on honor, quick thinking and fierce loyalty to protect his companion and unmask the conspiracy before it ignites open rebellion.

Purchase from Bookshop.org