Instruct: Classify the given Amazon review as either positive or negative.
Query: The Caves of Steel

The Caves of Steel was the first book in the Assimov foundation series. I found it to be one of the best books that I had ever read. This book is a fun, and easy to understand book. It will drive you into wondering who killed Dr. Sarton as Elijah and R. Deneel try to come to a solution. This book is very unpredictable, and exciting. This book was the first book that I have read by Assimov other than short stories in Robot Dreams. That is a collection of short stories by Assimov which is also excellent. So, I recomend this book to everyone who likes to read.