Mortis

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A young assassin must betray all she knows. In an underground school rife with duels and deadly classes, Jane hides in the shadows to stay alive. She is the invisible assassin. But as she prepares to graduate from Mortis and take her place in the world as a fully-trained killer, Jane stumbles over shadowy secrets revealing dark truths that affect more than her world. Will she embrace the darkness, or betray the school that raised her-and the boy she loves? Once Jane sets herself against her school, there is no turning back because in Mortis, failure always means death.