Nightspell

The reclusive kingdom of Ghostland has been safe from invasion for a very long time. Centuries ago, a spell brought the dead back to life-and no other kingdom has dared challenge a country of ghosts. But the emperor of the plains is power-hungry. Four years ago, he sent his youngest daughter as an offering to Ghostland's king. Nothing more was heard from her. And so the emperor's ruthless son, Varis, and his warrior daughter, Darri, venture into Ghostland's forest. Varis is to carry out a new plan of his father's. But Darri is intent on only one thing-rescuing her sister, no matter what the cost, even if her sister no longer wants to be rescued.
Full of surprising revelations, Nightspell hinges on the secrets of the ghostly court, the spells that bind them, and the vengeance underlying every move.