The Untold Prophecy by Jill Cooper

In a world where the dark lord won, one girl strives to unseat him through the power of books.

One girl, Tarnish Rose, rescues what was meant to be destroyed. Finding an occasional book long forgotten, those heart-warming tales speak to her very soul and could land her in the hands of the Dark Lord Creighton.

Her ability to read is a closely guarded secret, but as the man she’s betrothed to is set to be killed for violating the code of conduct, Tarnish finds her secret on the verge of being discovered.

Unable to let this happen, Tarnish is about to launch on the journey of her life not only to free him but to stop the Dark Lord Creighton himself. With the hunter death squads on her tail, she’ll rush for a waiting train and discover the world is full of secrets and join forces with other rebel librarians.

If the death hunters don’t get her first.