Possible Clues:

• Classic Icelandic saga
• Epic works from the much admired Dante
• Icelandic literary saga
• Icelandic work that influenced Tolkien
• Scandinavian books containing a collection of ancient mythological songs
• Old literary collection
• Work of prose or poetry
• That's the wrong way to put another E on the Norse
• Old Icelandic literary collection
• Put E on up there for what comes from the Norse