Whether it's wild or farmed, fresh or tinned, in batter or a bento box, we're eating more fish than ever before. But what's the story behind the fish on your plate? Award-winning writer and lifelong fisherman Paul Greenberg takes us on a culinary journey through the oceans, telling the stories of the fish we eat the most: salmon, cod, bass and tuna. He visits Norwegian mega farms that use genetic techniques once pioneered on sheep to grow 500,000 tons of salmon a year. He travels to Alaska to see the only Fair Trade certified fishing company in the world. He investigates the pollutants that cause mercury build-up in seafood; discovers how Mediterranean sea bass went global; meets a Polish emigre on the Shetland Islands who may have saved the cod; and gets sea-sick chasing blue fin tuna off Hawaii. Throughout, Greenberg poses the questions many of us ask when confronted with a seafood menu or a supermarket shelf: which fish can I eat without worrying? What does overfishing mean? What's the difference between wild, farmed and organic? Should humans domesticate fish as we have animals - or stop eating from the sea altogether? Fish, Greenberg shows, are the last truly wild food we eat - for now. By understanding fully how it gets to our dinner table, we can start to enjoy fish in a way that's healthy for us - and good for the world that exists off our coasts.