I bought this book when I was researching for an A level essay on HIV, for which the book was an excellent resource. Once this task was out of the way I found myself absorbed in the book, and enjoyed seeing the story of pharmacology and medicine unfold (fighting bacteria, antiviral treatments and anticancer drugs are the three main sections). It's always a fine balance in popular science between the scientific detail and the human story and process of discovery, and John Mann manages this with enough skill to leave me inspired by our progress since the early days of vaccination, and thankful I live in the modern world!