If you take a writing class, you may be told that the essence of fiction is conflict, and that there can be no story, or at least no interesting story, without it. This is one of those books that dispels that notion. There is no conflict here, no drama, no tension, very little suspense -- and it's absolutely delightful. Your kids will be grinning ear-to-ear throughout. There isn't even (gasp!) a villain. The world in this book is a world filled with smart, kind, if eccentric, children and adults -- easy-going, humorous, friendly, and utterly charming. The pleasure in the story comes from watching them hatch and carry out their dingbat plan (hanging up fishing nets so they can practice throwing and hitting without losing the ball in their village teetering on the edge of the sea), and then seeing the city through their eyes.
THUMB ON A DIAMOND is just for fun -- no great issues (other than "Why can't we all live a little more like this?"), no mystery to solve, just pleasure. And, aside from some rather ugly cartoon illustrations, this book is a lovely experience.