Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Excellent Book

As a Professor in a Department Computer and Information Science at Shepherd College - I am constantly reviewing text books for our Computer Science Department. I recently took a Doctorate class in Operating Systems were this text was used. My opinion is that this text did a wonderful job explain memory management, scheduling, processing, and deadlocking. Chapters 1 through 8 spent a great deal of time explaining the theory of an operating system.I only have a few complaints - the first one is the exercises at the end of the chapters. The exercises could have example throughout the text. Some of the questions were not written very well. I am a visual learning and the text needs more visual examples.Overall - I liked the text and I will be using it in my CIS 390 Operating Systems course at Shepherd College.