The Isis pedlar
The community of the planet of Isis, misled by power-hungry space captain Michael Joseph Flynn, moves down the path of destruction until Moira, the captain's daughter, exposes his self-serving designs.
Juvenile fiction, Fiction, Fathers and daughters, Science fiction, Life on other planets
Monica Hughes        
Monica Hughes OC (November 3, 1925 – March 7, 2003) was an English-Canadian author of books for children and young adults, especially science fiction. She also wrote adventure and historical novels set in Canada, and the text for some children's picture books. She may be known best for the Isis trilogy of young-adult science fiction novels (1980–1982).

**Source**: [Monica Hughes](https://en.wikipedia.org/wiki/Monica_Hughes) on Wikipedia.