When Charles Mandrake's condition turns critical on the Skelderheim steppe, Anna and Todd do the only thing they can. They bring him home.

They return to East Bay with more than they left with. A Veil guard named Lenne, gravely wounded and running out of time. A five-year-old girl named Azaya who came off the Skelderheim docks with a bread board, a set of lock picks, and no intention of leaving the woman who fell protecting her. And questions about Myles Pibbles that have been waiting in the walls of the mansion on the hill since before any of them arrived.

The answers surface the way Myles did everything. Quietly, and exactly where he intended them to be found. A locked room off the main hall holds a library built from two worlds. A private freight system runs beneath the entire city of Skelderheim. A radio in Finch's shop comes to life on a frequency nobody has touched in years. One by one, the people who have always been closest to them turn out to have always been exactly where they were meant to be.

The third book in the Charles Mandrake arc is not about a world in crisis. It is about what gets built in the quiet, who it gets built for, and what happens when the people meant to inherit it finally start opening the right doors.
It is also, unexpectedly, about a five-year-old who figures most of it out first.