A woman abseils down from the shelf above. Her back is crowded with map cases, satchels, and even a theodolite. Surely this place is too vast to map?

Today, we launch an expansion to the Stacks – Firmament's major new activity. New options, a new route, and some balance tweaks.

We're also adding a new small piece of paid content – the Clamorous Cartographer, a fellow wanderer in the library who's trying to do the impossible: map the Stacks. Unlocking the Cartographer adds new cards and options in the Stacks, which can be turned on and off at will, plus a new route.

For players who have reached the Stacks, many of the new options are available immediately; some, including the Clamorous Cartographer, require Interloper in the Library 4 or higher.

You can unlock the Stacks in Chapter Two of Firmament, and then access it from the Midnight Moon.