First, this front cover, while cool, is misleading. While the story appeared to be a kid's version of SF pulp magazines of yesteryear, the series had grown more philosophical and sophisticated by the third and fourth books. Anyhow, this is just the cover, the story is pure magic. Coville manages to tie up all, or most, of his loose threads into pretty bows. We readers have grown to love the aliens as friends and there is a bigger picture to contemplate. What happens to our favorite sixth graders and the aliens? You must read to find out. Coville has created another gem.