I haven't actually read it, so can't really say. DS *loves* it, but he is only 6, so ymmv. Actually I'll go and ask him... Not sure that helped; he says, "it's fact and fiction intertwined, and that's my favourite kind of book...", "the story is mostly Gedanken finding the fact things out", and "it's just as good as George's Cosmic Treasure Hunt, not better not worse". Perhaps the conclusion is that it *is* lightweight, but enjoyable. It certainly is not going to be the end of the line for a child who is interested in quantum mechanics, but maybe a useful step on the way. It's a fairly well-known book, so maybe get it from a library and see?
