User blog comment:The Rim of the Sky/Bethesda to Publish Physical Lore based books on the Elder Scrolls series/@comment-24640703-20141023175055/@comment-807801-20141105041147

It's so similar to Tolkien because both Tolkien's stuff and Skyrim are based very heavily on Norse/Anglo Saxon mythology, which has Ragnarok. Alduin the World-Eater is basically Jormungandr.