Reagan Vale has survived the Archive, the Unwritten, and the truth of her own blood. But when a second ancient Root stirs beneath the drowned foundations of Venice, every ledger trembles—and every house that buried the truth begins to fear what might rise.

Mercy Row feels it first.
Venice feels it next.
And Reagan feels it in her bones.

Called across the sea to a city of masks, secrets, and ancient debts, Reagan must decide whether her legacy is a weapon, a warning, or a door she was never meant to open.

All roots lead somewhere.
Some lead home.
Some lead to ruin.

The Archive is waking.
And it has questions only she can answer.