"Niels Riding a Goose" writes about the wonderful growth process of a little boy who doesn't like to study. The little boy Niels played a trick on the elf and was transformed by the elf into a little man about the same size as a mouse. He rode on the domestic goose and followed a group of wild geese to a distant place. During the journey, Niels gained knowledge, met many friends, and encountered various difficulties. In the end, Niels recovered his original shape and became a good boy. This is the representative work of Swedish female writer Selma Lagerlof. She uses interesting stories and humorous writing to introduce the Swedish landforms and customs. It is a book that integrates literature, knowledge and science. It is also the first fairy tale in the history of world literature to win the Nobel Prize for Literature.