Penumbra - The Poisoned Past, #2

Lord Jester Lark is desperate to escape Cathret before the Church finds him and finishes what they began in a dark ritual chamber below the Court. Though he has allies, he quickly learns that he can't trust them with his freedom. He may not even be able to trust himself as the mask he's burdened with deepens its hold. While delivering messages across battlelines, the Duchess Gzem Kelleisen searches for any sign of her missing son.
Then she meets the Wolf Prince, a man who once loved her and intends to claim her for his own. The prince has the power to help her, but she might lose her husband's love, or even cost him his life. When Lark and Gzem's paths cross, it will change the course of the war, and bring humanity closer to its salvation ... or its doom.