“Getica: The Origin and Deeds of the Goths” by Jordanes, translated by Charles Mierow.
“De origine actibusque Getarum” (The Origin and Deeds of the Goths), or the Getica, written in Late Latin by Jordanes, a 6th century bureaucrat of the Eastern Roman Empire, who turned his hand to history late in life, in or shortly after 551 AD, claims to be a summary of a voluminous account by Cassiodorus of the origin and history of the Gothic people, which is now lost.
However, the extent to which Jordanes actually used the work of Cassiodorus is unknown.
It is significant as the only remaining contemporaneous resource that gives the full story of the origin and history of the Goths.
Another aspect of this work is its information about the early history and the customs of Slavs.