Book excerpt: This book Food in a Planetary Emergency is a timely overview of the current food systems and the required transformations to respond to the challenges of climate change, population pressures, biodiversity loss and use of natural resources, such as soils, water and phosphorus. This book takes a planetary health perspective which explores the links between natural systems and human wellbeing implying that there is need for united actions to achieve important environmental and population health co-benefits. This book outlines that the foundation of planetary health is sustainability. It addresses environment and climate change emergency as a global agenda, however, emphasises the urgency of the sustainability perspective which integrates a wide spectrum of issues that require integrated solutions to offer better prospects for humanity. This book drives this argument further through the global Sustainable Development Goals (SDGs) where food is not just SDG2 but transcends all 17 goals. This book tackles the problems of food production and consumption at a global, industry and individual level linking it to topics related to the natural environment, climate change, waste, marketing, new ways of producing food and providing alternative proteins, mitigating non-communicable diseases, flexitarianism and the role of Generation Z in the emerging dietary choices. This book benefits readers with understanding the importance and intricacy of their dietary choices at a point in time when our planet is facing an emergency triggered by long-term dependence on fossil fuels and artificial fertilisers but also by the ways we have provided food. However, this book also delivers the message that safeguarding and sustaining planetary health is possible.