The Last Emprex is the sixth, and final, book in the 
Shark Wars series by E.J Altbacker. It was released on July 2, 2013, and Gray is on the cover, sharks around him, with two clouds of blood coming from some of them. 


Gray is practicing shar-kata with Takiza, with Leilani watching. Takiza tells Gray that he brought Leilani just to show off, which Gray was actually doing, but does not admit it. Meanwhile, Kendra, Silversun, and Grinder are fighting against Grimkahn and Hokuu. Grinder has to bring the injured sharks to Fathomir, so Kendra and Silversun take the diamondhead, sadly dying. Hokuu watches the battle, fantazising about now that he is using the same strategy as Gray's team, he will win, and also about when he will take Grimkahn's place as leader of Sixth Shiver.