1Heidi is a Swiss work of fiction, originally published in two parts as Heidi's years of learning and travel and Heidi makes use of what she has learned. It 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 as a book "for children and those who love children" in 1880 by Swiss author Johanna Spyri. Heidi is one of the best-selling books ever written and is among the best-known works of Swiss literature.