Pippi Longstocking by Astrid Lindgren
Tommy and his sister Annika have a new neighbor, and her name is Pippi Longstocking. She has crazy red pigtails, no parents to tell her what to do, a horse that lives on her porch, and a pet monkey named Mr. Nilsson. Whether Pippiās scrubbing her floors, doing arithmetic, or stirring things up at a fancy tea party, her flair for the outrageous always seems to lead to another adventure.