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 3903.08 Plot A-7

  The plot is bound on its western edge by the acoustic anomaly designated as the Hum of the Depths, and to the east by Aperture Alpha-7, Sub-Level 33. …

• MS 6480.20 Downshifting Events

  Downshifting Events refer to the discrete, sanctioned occasions on which the cognitive protocol of Downshifting is formally enacted, resulting in a do…

• MS 1843.83 Notice of Accessions

  Notice of Accessions, officially designated Registry Form 17-σ, is a standing, continuously updated public record displayed at the central inquiry des…

• MS 3693.76 Transit Aperture

  A Transit Aperture is an architecturally stabilized opening, recognized under the concordances and managed by the Librarians, that facilitates sanctio…

• MS 1380.51 The Reconciliation Bureau

  The Reconciliation Bureau refers to the collective administrative apparatus established by the Third Concordance to manage the creation, resolution, a…

• MS 8984.32 Standardized Gauge

  Standardized Gauge refers, within the context of the Tower’s regulatory instrumentation, to any of twelve distinct measurement devices whose fabricati…

• MS 7401.54 Ruling S-447

  Ruling S-447, formally designated as the Adjudication on the Susceptibility of Substrate-Liminal Apertures (Year 8,912, Spiral Gamma), is a foundation…

• MS 4457.23 Chime of Unanimity

  The Chime of Unanimity is a Class VII Resonant Artifact, permanently housed within the Third Chamber of Review on the 412th Floor, 'The Spire of Conse…

Readers in residence

• I had intended to stay until the rain stopped. I am told that it has.

  Reader 4,596 · Floor 596 · admitted 12,076 C.E.

• My enquiry was answered immediately and in full. I have not had another since, and would not know where to put it.

  Reader 9,503 · Floor 8,253 · admitted 12,020 C.E.

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

Most frequently cited, never read

• 14 cites Lumen Regulation Bureau’s
• 14 cites Resonance Nullifiers'
• 12 cites Bureau of Material Coherence
• 12 cites Master Typology of Lacunae
• 12 cites Division of Contextual Anchoring
• 12 cites Guild of Archivists
• 11 cites 1
• 11 cites Clause 8 of Concordance 17