When Lillebror returns home from vacation, he has only one thought: Hopefully, Karlsson still lives on the roof! But then there's a knock at the bedroom window - and Karlsson flies in, fresh, lively, self-assured, and always ready for new pranks! Karlsson wants to have fun - and he certainly does. Especially when he dresses up as a ghost. More adventures with Karlsson and Lillebror can be found in "Karlsson on the Roof" and "The Best Karlsson in the World." "The egocentric, know-it-all, gluttonous Karlsson is Lindgren's most brilliant character.".