The crawler's underground manual, its nineteenth edition written by a man who died in orbit.
The cookbook surfaces here through its authorship rather than its contents. Looking down at Earth from the Security Checkpoint, Carl immediately thinks of Coolie, who wrote the nineteenth edition — the same edition Carl has been working from — and who died after a failed assassination attempt on a pair of admins, with his own homeworld filling the view.
That detail reframes the book as something written by people who tried to fight the administration and lost, and the succession of editions as a chain of authors who did not survive their own advice. Carl is standing, near enough, where the nineteenth edition's writer stood at the end.
Not physically described in this chapter; known by its edition numbering and its lineage of authors.
The crawler underground's inherited manual, whose nineteenth edition ties Carl to a predecessor killed for moving on the admins.