The Labyrinth — Joyce Swann

Months after the collapse of New America, Petra and Rahm have settled into the routine, boring life they've always dreamed of. But when Rahm's cousins, Jarrod and Joshua Sinclair, enlist their help to stop the Kairos family, they discover a new global threat even more dangerous than Mandrake's government.Now with the Sinclairs' aid and assistance from veteran detective Fred Kowalski, Petra and Rahm must travel to Europe to battle a Force more sinister than anything they have ever experienced.