The Wonderful Adventure of Nils Holgersson by Selma Lagerlöf

Nils Holgersson is a naughty boy who tortures animals and never listens to his parents - until one day he wakes up as an elf. Deeply puzzled by his new status, he climbs on a gander's back and flies away with him, joining a flock of wild geese. As he is carried around Sweden, Nils learns everything about birds, animals, his country and good behaviour. Incredibly charming and poignant, The Wonderful Adventure of Nils Holgersson is a timeless classic loved by generations of children around the world.