Classics, modern fiction, non-fiction and more. Written for secondary and adult students the Oxford Bookworms Library has seven reading levels from A1-C1 of the CEFR. In 2015, the 193 countries of the United Nations agreed on seventeen Sustainable Development Goals. This book explains each of the goals and gives examples of the wonderful work that is already happening around the world to end these huge problems. It also gives great ideas of changes that we can all make in our own lives.