No one is quite like Karlsson: He lives on the roof and has a small motor on his back that allows him to fly through the air. He is crazy about candy and meatballs and is incredibly conceited. And he is the best friend of Lillebror. Since Karlsson started knocking on the children's room window and visiting him regularly, Lillebror has never been bored again! More adventures with Karlsson and Lillebror can be found in "Karlsson Flies Again" and "The Best Karlsson in the World." The self-centered, know-it-all, gluttonous Karlsson is Lindgren's most brilliant character.