[1] It was originally published in Australia by Oxford University Press with illustrations by Malcolm Green.
It won the Children's Book of the Year Award: Older Readers in 1977.
When his condition is diagnosed the family moves from its home on the coast north of Sydney down to the big city.
The novel follows the challenges the family faces, not only with caring for Carl, but also with the major change of household location.
Writing about Spence's books for children, Walter McVitty noted that the author's experience of working as an aide at a centre for autistic children certainly informed the work, and the information imparted "adds to one's range of understanding or people and problems, just as does the author's skill in representing family life while allowing for individual studies within it."