“East of the Sun and West of the Moon” is the third entry in The Blue Fairy Book. This Norwegian fairy tale was originally collected by Peter Christen Asbjørnsen and Jørgen Moe. It is Aarne–Thompson type 425A, Search for the Lost Husband. It is related to both the tale of “Cupid and Psyche” in The Golden Ass and to “Beauty and the Beast.” Beauty and the Beast is usually given its own subcategory as 425C which has the same name as the tale. East of the Sun and West of the Moon is usually placed in 425A: The Animal Bridegroom (Thompson 1945). You can read the entire fairy tale for free at Patreon.
Other related entries include She Sees Him by Candlelight, The Golden Age of Illustration, Riding the Wind, and The Troll Bride. Enjoy!