Instruct: Classify a given review into positive or negative sentiment.
Query: Very deep and insightful

Author provides a lot of information. Shows big concerns for the survival of these living beings. The author goes into technical details on the equipment needed to get into this hobby. He also profiles numerous sea life. Found it very useful and I'm gonna start my project plan list based on the information provided in this book. Highly recommend this book for beginners looking to get into this hobby.