Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Plenty of Ice But No Zebra

Maclean lost his battle with alcoholism later in life, and it adversely affected his output. His novels became shorter and their characterization flatter, and in Athabasca, he presents one character's alcoholism in virtually a positive light. The plot of this story is forgettable too and there's only about ten pages near the end where 'master of suspense' can be applied to the writing. A sad decline for someone who was the Tom Clancy of his day and is virtually forgotten barely fifteen years after his death. As for this book, read Ice Station Zebra if you want to play in the snow!