Heidi is a Swiss work of fiction, published in two parts as (1) Heidi's years of learning and travel (German: Heidis Lehr- und Wanderjahre) and (2) 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" (as quoted from its subtitle) in 1880 by Swiss author Johanna Spyri.
The Heidi book is among the best-known works of Swiss literature.