"Heidi" is a novel about the events in the life of a young girl in her grandfather's care in the Swiss Alps. It was written in 1880 by Swiss author Johanna Spyri.
Heidi is a girl who has been raised by her aunt Dete in Maienfeld, Switzerland after the early deaths of her parents. Dete brings 5-year-old Heidi to her grandfather, who lives in seclusion on the alm. He at first resents Heidi's arrival, but the girl manages to penetrate his harsh exterior and Heidi subsequently has a delightful stay with him and her best friend, young Peter the goat-herd.
Dete returns three years later to bring Heidi to Frankfurt as a companion of a 12-year-old girl named Klara Sesemann, who is regarded as an invalid. Heidi spends a year with Klara, conflicting with the Sesemanns' strict housekeeper Fraulein Rottenmeier and becoming more and more homesick. Her one diversion is learning to read and write, motivated by her desire to go home and read to Peter's blind grandmother. Heidi's increasingly failing health, and several instances of sleepwalking that cause hysteria in the household that there is a haunting, prompt Klara's doctor to send her home to her grandfather. Her return prompts the grandfather to descend to the village for the first time in years, marking an end to his seclusion.
Heidi and Klara continue to contact each other. A visit by the doctor to Heidi and her grandfather convinces him to recommend Klara to visit Heidi. Meanwhile, Heidi teaches Peter to read and write. Klara makes the journey the next season and spends a wonderful summer with Heidi. Klara becomes stronger on goat's milk and fresh mountain air, but Peter, feeling deprived of Heidi's attention, pushes Klara's wheelchair down the mountain to its destruction. Without her wheelchair, Klara attempts to walk and is gradually successful.