"Heidi kann brauchen, was es gelernt hat" by Johanna Spyri is a novel published in 1881. In this sequel, young Heidi's friend Klara comes to visit the Alpine mountains, hoping the fresh air will improve her delicate health. But Peter the goatherd grows jealous of the time Heidi spends with her guest, leading to a destructive act. As Klara attempts her first steps on the mountain meadows, the story unfolds into a tale of friendship, healing, and second chances among the Swiss peaks.