Thunderhead

Some of the major plot twists are really goofy and undermine the tension that should be building. Citra and Rowan continue to have no romantic leanings, but it's stated they exchanged “I love yous” between books. I strongly believe Neal Shusterman's agent or publisher said he had to include a romantic pairing or it wouldn't sell. So he added a few sentences and called it a day.

Instead of Scythe journal entries, the Thunderhead itself waxes philosophical between every chapter. I enjoyed the AI perspective for the most part. A few new characters are introduced, one of which is totally dedicated to the Thunderhead, so we get a new perspective on the all powerful system that the characters couldn't interact with in the first book.