Mara Jade: By the Emperor's Hand #3

Mara Jade is beautiful, intelligent—and deadly! She is the personal assassin of the Empire's dark overlord. But after the Emperor's death, an unforeseen variable is about to enter the scene of her final mission, the assassination of the leader of the Black Nebula crime organization. Though her master is dead, Jade must complete her final mission… even if it costs her life!