Prisoner of Darkness: A Guardians novel

My world collapsed the day my father died—taken by a mysterious illness spreading across a far-off continent. He sacrificed everything in a desperate attempt to save my mother’s life, and when he was gone, so was the safety I had always known.
To keep my mother alive, an agreement must be made.

Signing a marriage contract with a potential enemy seems to be my only choice. It’s a bargain I never wanted, but one I cannot refuse. William Cobalt, second-in-command of the powerful organization that controls Terrin, may be the only man capable of protecting my mother’s life—and my brother’s lands.

He should be my enemy.

That is, until an unexpected complication is added to an already dangerous mix, threatening not only my future, but everything I thought I understood about this world.