Thunderhead by Neal Shusterman From Goodreads: Rowan has gone rogue, and has taken it upon himself to put the Scythedom through a trial by fire. Literally. In the year since Winter Conclave, he has gone off-grid, and has been striking out against corrupt scythes—not only in MidMerica, but across the entire continent. He is a dark folk hero now—“Scythe Lucifer”—a vigilante taking down corrupt scythes in flames. Citra, now a junior scythe under Scythe Curie, sees the corruption and wants to help change it from the inside out, but is thwarted at every turn, and threatened by the “new order” scythes. Realizing she cannot do this alone—or even with the help of…