Thistle & Thorne by Ann Aguirre
After a catastrophic spill turns the country into a vast chemical wasteland, those who could afford it retreated to fortresses, self-contained communities run by powerful corporations. But for Mari Thistle, life on the outside-in the Red Zone-is a constant struggle. To protect her family, Mari teams up with the mysterious Thorne Goodman. Together, they’ll face an evil plot in both the underworld of the Red Zone and the society inside the fortresses that could destroy those on the outside…for good.