Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Many good points, should've been two books, not one

As always with these books Turtledove has a lot of good ideas and concepts, I eagerly awaited this one. I was surprised to find a book with so many loose ends, bits and pieces that it needed to be two books not one. It makes me wonder if Mr. Turtledove wanted to end the series (I've heard that this is to be the last)in a hurry but had two books worth of material to get rid of.