Written for readers who have finished Book 1.
NIPA — the National Identity & Payments Authority — is the government body that merged the country's identity and payments systems into a single national rail, and the workplace where Hannah's fiancé Josh helps build it. Seen from the inside, it is bright, well-meaning, and utterly sure of its own good intentions. It is the machine at the heart of the story's world, and what such a machine becomes runs through the whole trilogy.