"Pelle Svanslös" is a Swedish children's book series written by Gösta Knutsson. The main character is a cat named Pelle who was born without a tail. Despite his physical difference, Pelle is a brave and adventurous cat who goes on many exciting adventures with his friends in the town of Uppsala. Along the way, Pelle learns important lessons about friendship, acceptance, and overcoming obstacles. The series has been beloved by generations of Swedish children and has been adapted into movies, TV shows, and theater productions."