Pippi Longstocking is a beloved children's book by Astrid Lindgren. The book follows the adventures of Pippi, a young girl with bright red hair and superhuman strength, who lives on her own with her pet monkey and horse. Pippi's wild imagination, playful spirit, and unconventional ways make her a favorite among children and adults alike. Lindgren's delightful storytelling and lovable characters have made this book a timeless classic.