Legends of Ahn: King's Dark Tidings, Book 3

Rezkin is an elite warrior who aims to restore order in Ashai after Caydean's attack on the King's Tournament transformed former allies and trading partners into enemies. With no army and only a ragtag group of refugees, Rezkin must wrest control of the kingdom from the mad and powerful usurper, who seems bent on destruction, and this may not be the biggest challenge. If he fails, the kingdom will be ripped apart, and Rezkin will have violated Rule 1 - to protect and honor his friends - leaving him without country, purpose, or honor.