Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Absolutely the worst book... total waste of time.

The best thing about the book is probably the cover. The story starts out ok but has the worst ending ever. Hogan has the two opposing doctors/scientists, after they get infected with the virus, turn into monsters (or whatever you want to call them) and basically fist-fight it out. Come on... that might be ok for a comic book, and is something I may have liked as a kid, but for a novel for adults, it's terrible.Absolutely the worst book I have ever read.Instead, read "The Hot Zone" by Richard Preston. Much much better... and it's nonfiction!