When Joseph Jebelli was 12, his beloved grandfather began to act very strangely. It started with inexplicable walks, and gradually his bright smiles were replaced by a fearful, withdrawn expression. Before long, he didn't recognise his family any more. Dr Jebelli has dedicated his career to understanding Alzheimer's disease, which affects millions worldwide and 850,000 people in the UK alone. In this, his first book, Jebelli explores the past, present and future of Alzheimer's disease starting from the very beginning - the first recorded case more than one hundred years ago - right up to the cutting-edge research being done today.