This is a sequel to Old Man's War, and I can sum up its flaws in a word: Exposition.As in the book is full of it. Too much. It lacks the kind of action that made Old Man's War interesting, and any time the plot is in danger of picking up too much momentum, the characters start talking. And talking. And explaining.It's not terrible and the ideas are interesting, but it's so much more workmanlike than the first one, and in the end, I wasn't sad to put it down. Scalzi's written better, though anyone who invested in the Old Man's War universe might enjoy this anyway.