Most of the English editions of The Wonderful Adventures of Nils are translated by Velma Swanston Howard, but she she did not translate the entire novel. There is now a fine full translation of the novel by Peter Graves (Norvik Press, 2013), and I would recommend reading it all! The map covers the entire novel and shows Nils' wonderful journey up towards Kebnekaise and back again through western Sweden where he visits, among other places, the estate where the writer Selma Lagerlöf grew up, Mårbacka.
Mårbacka played an important role in Selma Lagerlöf's life. After her father's death in 1885, the son Johan took over the estate, but he went bankrupt and moved to the United States so the family had to sell the estate in 1889. Selma Lagerlöf bought back the main building in 1907, and in 1910 she was able to buy back the whole estate with the help of the prize money she received when she was awarded the Nobel Prize in Literature in 1909 (the first woman).