[1] It was originally published by Flammarion in Paris (1936),[2] and in New York by Grosset & Dunlap (1938), illustrated by Jean Coquillot.

Grandfather tells Heidi and Jamy legends that excite the visitor through the rest of the summer vacation.

Heidi learns the former teacher would put troublesome children in the cave, and called it the "school dungeon".

Peter wears his green Sunday suit, and Jamy leads a children's choir of school students.

Other wedding guests include Heidi's old friend, Klara, and Jamy's little sister, Martha.

Charles Tritten wrote this and the three later novels primarily by adapting from Johanna Spyri's other children's stories, given their similar settings and storylines.