Dr Bert Cargill's lifetime interest in nature and in science sits side by side with his Christian faith. He was brought up in a coastal village in Scotland, and was converted to Christ early in life. He specialised in chemistry, earning two degrees and several medals for achievement from St Andrews University, then pursued a research and teaching career at Abertay University, Dundee for over 30 years. His background gives authority to whathe has written in books like this for the benefit of non-specialists.