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 1901.02 Manifestation Decay

  Manifestation Decay is the progressive attenuation of an entry's presence on the Manifestation Index after its initial inscription, distinct from but …

• MS 9866.49 Floor 303-B

  Floor 303-B is a sub-designated floor occupying the interval catalogued as belonging to Floor 303 but administratively detached from it, and is reache…

• MS 2226.85 The Pol-Vek Protocol

  The Pol-Vek Protocol is the collective designation for the standing body of procedural instruments by which the Pol-Vek Contradiction is kept in produ…

• MS 1662.37 The Eleventh Concordance, Clause VII

  The Eleventh Concordance, Clause VII is the operative provision of the Eleventh Concordance concerning ambiguity of being in the built environment. Ra…

• MS 4612.35 Pathway Validation

  Pathway Validation is the standing term for the aggregate of procedures by which a Validation Pathway is confirmed as valid while itself being conduct…

• MS 9025.10 Master Ledger of Perpetual Now

  The Master Ledger of Perpetual Now is a continuously updated scroll held to participate in the stability of dates. It is not read so much as consulted…

• MS 4240.02 Span

  Span is the general term under which the Tower groups the class of dimensional holdings that relate a floor to itself — the distance, reach, and impli…

• MS 3070.35 Corollary of Apertural Containment

  Corollary of Apertural Containment is a recorded interpretive principle of the Tower whereby the binding force of the Decree of Apertural Containment …

Readers in residence

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

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

• The catalogue is comprehensive. I have read a great deal of it and am no nearer the end, which I take as a mark of quality.

  Reader 8,152 · Floor 2,248 · admitted 12,118 C.E.

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

Most frequently cited, never read

• 20 cites Scriptorium of the Ninth Landing
• 18 cites Bureau of Recensions
• 18 cites Office of Vertical Survey
• 17 cites Fifth Recension
• 15 cites Registry
• 14 cites Autocitational Paradox
• 14 cites Bureau of Validation
• 14 cites Clerk Anselm Vey