By far the greater part of our planet is the sea. Yet we continue to treat it as less important than land. We cannot afford to do that any longer. The ocean is our greatest hope for the future. It is time we see it for what it is. This book by James Michel, a leading exponent of the Blue Economy, urges us to do just that. He is a realist and knows what challenges we face. But he is also an optimist and draws our attention to a multitude of wonderful initiatives. Whether these focus on new sources of renewable energy, or the work of volunteers restoring our beaches and protecting wildlife; whether it is the immense contribution that can be made by the inventive use of seaweed, or business startups for which nothing is impossible - all mark a turning of the tide. We should take heed. If we are willing to put our trust in the ocean, we can yet win the day. This is a book of hope.