Beowulf: A Translation and Commentary was released in 2014. It contains a translation of the poem Beowulf (dating back more than a 100 years) from Old English to Modern English together with an extensive commentary. J.R.R. Tolkien wrote the translation in 1920-1926, but was not published until the son Christopher edited this volume. It also contains Sellic Spell and two versions of The Lay of Beowulf.
As an undergraduate student, Tolkien wrote The Story of Kullervo, inspired by the tales in Finnish Kalevala. This story was to further inspire the story of The Children of Húrin and the character of the dog Huan in the stories of Beren and Luthien.