Set in New Zealand not long after World War II, this is the story of a small community which is visited by aliens - twice. As a children's book, it is interesting because the story opens with the perspectives of several older members of the community, and we slip inside the minds of these characters several times as the plot progresses. Our main character is Jonathan Wilkes, whose family helped found the settlement nearly a hundred years ago. There are only a dozen or so children in town, all of whom attend the local school, and children and adults of different ages interact a lot throughout the community.
A pale-haired and pale-skinned woman, Mrs Smith, and her son, Karl, arrive. They are the second expedition of an alien species to visit this settlement. The first, visiting around 1893, committed a crime, and now Mrs Smith and Karl (aka Visha and Garl) are here to investigate and set things right. The science fiction focus of the story is on telepathy and evolution, but what I really enjoyed about the story was the way the community interacted.
I don't know that I would have enjoyed this book as a child, but as an adult I found it interesting.