The Children of Odin: The Book of Northern Myths — Padraic Colum

Once there was another Sun and another Moon; a different Sun and a different Moon from the ones we see now. Sol was the name of that Sun and Mani was the name of that Moon. But always behind Sol and Mani wolves went, a wolf behind each. The wolves caught on them at last and they devoured Sol and Mani. And then the world was in darkness and cold.
In those times the Gods lived, Odin and Thor, Hödur and Baldur, Tyr and Heimdall, Vidar and Vali, as well as Loki, the doer of good and the doer of evil. And the beautiful Goddesses were living then, Frigga, Freya, Nanna, Iduna, and Sif. But in the days when the Sun and Moon were destroyed the Gods were destroyed too -- all the Gods except Baldur who had died before that time, Vidar and Vali, the sons of Odin, and Modi and Magni, the sons of Thor.