Plume Coteries' Library

The Plume Coteries' Library was "one of several places that claim[ed] to be the biggest library in the Universe". It was tended by the Plume Coteries, hence their nickname as "Bookkeepers", and allegedly had a copy of every book ever written.

History
When the painted warriors attacked the 10,000 Dawns, they stole every copy of The Book of the Enemy therein to cover their tracks. However, the Emissary advised Graelyn Scythes, Archimedes Von Ahnerabe and Lady Aesculapius that a copy could still be found in the Plume Coteries' Library. Travelling there via crystalline incision portal, they happened upon Coloth, who got Marissa to consult the catalogue. Marissa gave them a glowing library card which would direct them to the book despite the place's unthinkable size, but advised Coloth to go with them because the book itself might prove dangerous. After locating it, the group discovered that the painted warriors were servants of the Original Mammoths and travelled via another portal to the alter-time realm the mammoths called home in the context of the war. (PROSE: White Canvas)