History of Unveiling

Unveiling is a lore book introduced in Shadowkeep. Its entries are messages from the Unknown Artifact, addressed to Eris Morn and Guardians, in which the Witness tries to win the reader over with a creation parable.

Acquisition

New entries unlock once a week. You get them by visiting Eris Morn on the Moon after finishing the Beyond mission.

The Destinypedia page gives a verbatim transcription, and a separate Interpretation page annotates the more obscure terms.