Dr Bert Cargill retired from chemistry teaching and research at Abertay University, Dundee. A lifelong commitment to Christian service has underpinned his Biblical point of view on nature and the environment, as in his other books Creation's Story (2008) and Considering Creation (2020). He also wrote the Tell me More about ... series to bring basic Christian truths especially to readers whose first language is not English. Married to Isobel, they have a grownup family including great-grandchildren.