Joan Richards was involved in a book about the life and work of the 19th-century mathematician Augustus De Morgan when her nine year old son was diagnosed with ... » 

Joan Richards was involved in a book about the life and work of the 19th-century mathematician Augustus De Morgan when her nine year old son was diagnosed with a brain tumour. She was forced by her son's illness to confront the irrational world of a serious family illness and its consequences. «