Heidi is a classic children's book first published in 1881 in Germany by Swiss author Johanna Spyri in two parts: Heidi: Her Years of Wandering and Learning, and Heidi: How She Used What She Learned. Subtitled: "Geschichten f?r Kinder wie auch f?r Solche, Welche Kinder lieb haben von Johanna Spyri? Stories for children as well as those that love children by Johanna Spyri). It is one of the best-selling books ever written, and one of the best-known pieces of Swiss literature. Heidi tells the story of the namesake orphan brought to live with her grandfather in the Swiss Alps. Her cheery attitude wins the heart of her grumpy grandfather, the friendship of a goatherd Peter and his family, and the friendship of Clara, an city-dwelling invalid who later regains her mobility after visiting Heidi in the mountains. Two sequels, Heidi Grows Up and Heidi's Children, were not written by Spyri, but by her English translator, Charles Tritten.