A YA Paranormal Thriller with Zombies.

Raised from the dead as a revenant more than a hundred years ago, Zulu possesses superior stealth, superhuman speed, and a keen intellect. His only companion is Morgan the Seer, an old man cursed with longevity and the ability to see the future in his dreams. Zulu has spent the last century working with Morgan in order to save the people in his nightmares from horrible fates. Branded a vigilante by the media, Zulu must live his life in the shadows, travelling by night or in the city's underground, unless his quest demands otherwise.
Morgan also has enemies. His twin brother Malchus, a powerful necromancer, is raising an army of undead minions to hunt Morgan down.
Will they be able to stop Malchus from raising his army? How will they kill someone as powerful as Malchus? Is there more at stake than just their own lives?