 This is of course a sequel to Lingle's great book A Wrinkle in Time, and to the child readers who enjoyed A Wrinkle in Time, this book is absolutely necessary. For the adult reader, it's kind of tedious. It basically is A Wrinkle in Time, just with the names and the dates changed. Action for action, almost word for word, the same book. But again, for the very young readers who enjoyed the first book, they're going to get more of the same with the second book, and that's smart on the part of the author. This time the threat to Meg and her family is not at the far end of the universe, it's in the microverse deep inside the human cells, in the mitochondria specifically. And as with A Wrinkle in Time, you're going to find many thousands, perhaps even millions of scientists all over the world whose introduction to biology was the description of mitochondria in this book.