Empire of Night — Justin Somper

After shocking secrets behind their family's history are uncovered, twins Connor and Grace begin to question everything they've ever known about life at sea and, more important, every allegiance they've ever made.

Meanwhile, the ruthless Sidorio, determined to stake his claim on the dark waters, continues to expand his empire of renegade Vampirates. In an attempt to thwart his efforts, the Pirate Federation and the once-neutral Nocturnal Vampirates make plans to destroy every rebel Vampirate ship in sight.

There's a bloody battle brewing on the seas, and one thing is tragically clear: No ship is safe. . . .