Sustainable Pacific Northwest-based seaweed harvester Amanda Swinimer describes the ecology, culinary uses, evidence-based health benefits and climate change-resisting potential of seaweed and shares highlights from her remarkable life beneath the waves. Related to the most ancient living organisms on earth, seaweeds are incredible and unique life forms, sharing qualities with both plants and animals, as well as fungi. They have been prized as a nutrient-dense food source for millennia and contain essential vitamins, minerals and fatty acids, protein and fibre as well as biologically active compounds not found anywhere else in nature. Seaweeds are also a source for innovations combating climate change due in part to their ability to absorb massive quantities of carbon dioxide. Based in the Pacific Northwest, home to the greatest cold-water seaweed diversity in the world, Amanda Swinimer has made her living from the sustainable harvest of seaweeds for over two decades. In The Science and Spirit of Seaweed, Swinimer reflects on the journey that led to her successful seaweed harvesting business and provides identification information, ecologically sound harvesting techniques, traditional medicinal application and evidence-based health information for more than twenty varieties of seaweeds commonly found from California to Alaska. She also includes notes on culinary and skin-care uses for several types of seaweeds.