By Phil Cardy A coroner has blasted Amazon for selling a suicide handbook that a retired GP used to plot her death. Mary Jones, 86, was found dead in her home after ordering a copy from the retailing giant’s website. Since her death on November 7, two coroners have written to Amazon separately to protest about the sale of the book. But the US company is refusing to remove the manual – which we are not naming – and it can be obtained with speedier delivery if bought via Amazon’s Prime service. The book’s sale emerged after the death of Mary at her home in Knutsford, Cheshire, last November. Her…