The Eeshaypher Collection was a forbidden gallery of artifacts, relics, and antiques that were all related to the Dark side of the Force. By 21 ABY, Jedi Master Luke Skywalker had come into possession of an ancient book that was a catalog of the Eeshaypher collection. While studying the book on the planet Tython that year, Skywalker discovered an entry about a Sith wayfinder within it, the appearance of which he found analogous to that of a Sith holocron. The book described the Sith wayfinder as being used for the purpose of navigation, specifically to the ancient hidden Sith world of Exegol.