Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A terrific book by any standard.

Mike Whicker is a high school teacher and football coach. "Invitation to Valhalla" is apparently his first published book. Knowing those two things, one would be excused for having tempered expectations before digging into this WWII thriller of 'historical fiction'. And one would soon be pleasantly surprised.Read this book. It works on so many different levels.