In The Hall Of The Mountain King (translated into english)

Sebastian Zachariassen is a unhappy 8 year old who wants nothing more than a friend. He constantly wishes for one friend that he could play with, write with, be buddies with. One day, a new boy moves into his class and shows him a cave up in the snowy parts of Norway. But can Sebastian really trust this "friend"? Or is the friend really karma getting revenge on him for saying all those mean things about those boys who always teased him? And who lives in that cave that the new boy shows him?

(set in 1926, Norway, and written through diary entries)