The Tower catalogues subjects that do not exist. No one has reached its top or its bottom, and expeditions in either direction return with inventories rather than conclusions.

Search for anything. The catalogue will list holdings on it. Those holdings can then be read, at which point they were always there.

Recently read

• MS 0944.60 Department of Latent Ontologies

  Department of Latent Ontologies is a designation applied, at various points in the Tower's administrative history, to at least three non-identical bur…

• MS 3175.21 Mechanist School

  The Mechanist School is the collective designation for the body of cataloguers, assayers, and instrument-keepers who hold that a subject catalogued in…

• MS 9642.01 Keeper of Provisional Inks

  The Keeper of Provisional Inks is the officer of the Department of Provisional Archives accountable for the custody, decanting, and provisional classi…

• MS 2276.18 Spiral 9 Delivery Receipts

  Spiral 9 Delivery Receipts are the numbered certificates issued by the Bureau of Registry to acknowledge the conveyance of items along the ninth helic…

• MS 5276.85 First Manifesto

  The First Manifesto is the earliest document admitted to the Vault of First Principles, and by common though not universal consent the oldest survivin…

• MS 0142.36 Parchment Sap

  Parchment Sap is the informal collective term for the two run-off substances produced wherever parchment is rendered, cured, or converted under Tower …

• MS 0938.48 Expedition Ledger 8891

  Expedition Ledger 8891 is the bound field register assigned to the Third Sondergang Expedition and retained since its return under the custody of the …

• MS 2808.17 Chapter 5, "On the Syllable That Unnames"

  Chapter 5, "On the Syllable That Unnames" is the fifth chapter of the Forty-First Concordance, and constitutes the principal catalogical definition of…

Readers in residence

• Everything I have looked for has been here. I have stopped being certain that this is a good sign.

  Reader 9,551 · Floor 6,803 · admitted 12,006 C.E.

• I recommend the Tower without reservation to anyone without fixed commitments.

  Reader 4,333 · Floor 3,975 · admitted 12,114 C.E.

Accounts are collected at admission. The Tower does not solicit them on departure.

Most frequently cited, never read

• 23 cites Second Recension
• 22 cites Office of Recensions
• 19 cites Fourth Recension
• 17 cites Concordance 61
• 16 cites Office of Resonant Verification
• 15 cites Cartographer-Surveyor Guild
• 15 cites Concordance III
• 14 cites Doctrine of Coincidental Authority