Eldaxon's Collected Folklore is an anthology of ancient Talaxian folktales. The second edition of the book was published in 5012 of the New Calendar.
The first recorded usage of the word vaadwaur in Talaxian literature are in this book, specifically in the stories "The Demon with the Golden Voice", "The Tale of the Deadly Stranger", "The Tale of the Boy who Lost his Head", and "The Tale of the Bloody Hand".
A copy of this book was contained in Neelix's personal database. He referenced the work in 2376 after the USS Voyager discovered and revived a group of Vaadwaur survivors. (VOY: "Dragon's Teeth")