Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Outstanding! Another Great Book!

He has done it again! Down To Earth continues the Post World War Saga better than ever. The author's continued development of charcters makes you realize how mankind can adapt and prosper in any situation. I tend to "back read" DON'T! Let the events unfold as designed! In the past some have challenged the author to include maps with his books. In a way it is good that maps are not included - makes us draw back on our own history and knowledge... and appreciate the lure of the alternate history that Turtledove does so well.