Jyrki Korpua 
Tolkien and the Kalevala [PDF ebook] 

This book explores J. R. R. Tolkien’s unique and warm relationship to the Kalevala, a poem usually hailed as the Finnish and Karelian national epic, compiled, edited and partly revisioned from older folk poetry by Finnish scholar Elias Lonnrot in the 19th century. J. R. R. Tolkien, an Oxford academic and the greatest author of the 20th-century fantasy, creator of The Hobbit and The Lord of the Rings, was fascinated from early on by the Kalevala. Tolkien himself described the Kalevala as "a germ" of his fantasy fiction.