An Inquiry into the Nature of the Sentient Species is a collection of examples of historical events that reveal something about the mind of the species described. In-universe, the collection was originally compiled by the Twi'lek historian and folklorist Rohads Arling c. 755 BBY. The originals were since lost and the reprints have long fallen out of use, but they were since painstakingly reconstructed and pieced together by textual critic Susan Donnam. Though the Inquiry was far from fully reconstructed, some chapters were lost forever, the new edition of the Inquiry was the closest anyone could get to the original.