Watch CineCalidad. An account of the life and work of the Swiss writer Johanna Spyri (1827-1901), the barely known artistic mother of Heidi, her brave alpine heroine, who was first introduced to the world between 1880 and 1881, in a novel published in two parts, and became definitely immortal thanks to an anime series, released in 1974, directed by the Japanese genius Isao Takahata.