The Lord Protector (Usurper #3)

The Continent is doomed. A Plague against all non-magic users is spreading out of control. After a year of silence from Empress Jessamine, she finally returns and is ready to finish the war everyone thinks she started. She knows what she must do to keep her legacy forward, to keep this Continent safe. The only question is, is she willing to kill the man she loves to do so? Kaid Al-Yami will not remember, but there was once a time his love revealed Jessamine's true self, and there is this ungodly sense of hope she can do the same for him. The fate of the entire Continent rests on Kaid's shoulders, just as it has always been, just as it always will be. The man who can control time can control all, whether he wants to or not. That is...if Pestilence doesn't get to him first and take it all for himself.
The epic trilogy of the Usurper series ends here, with the stakes higher than ever, love even more doomed, yet somewhere in it all is the desire to do what is right, to balance this world even if it means killing the one you love.