Finished Thunderhead by Neal Shusterman.
Summary (from Goodreads):
“Rowan and Citra take opposite stances on the morality of the Scythedom, putting them at odds, in the second novel of the chilling New York Times bestselling series from Neal Shusterman, author of the Unwind dystology.
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 Scythe Curie and Faraday, she does the unthinkable, and risks being “deadish” so she can communicate with the Thunderhead—the only being on earth wise enough to solve the dire problems of a perfect world. But will it help solve those problems, or simply watch as perfection goes into decline?”
This is the second book in a trilogy, and just to warn you—you will be so desperate for the third book when you’re done with this one.
It’s hard to review second books, but this does everything one’s supposed to do: provide answers and more questions, raise the stakes, be complete enough to reasonably stand on its own but to also make obtaining the third book an absolute necessity. (Unfortunately, the third book will obviously not be here until 2019 and there isn’t an on-sale date yet. Could be roughly this time in 2019; could be end of December 2019.)
I love this book and this series. Highly recommended.