This book reveals extracts from secret discussions on dating evidence from the Shroud Science Group, a private, international forum of Shroud researchers and provides a detailed account of the dating evidence revealed by over a hundred years of research. It outlines reasons why the 1988 radiocarbon dating test continues to attract criticism from respected scientists and also describes a series of innovative flax dating techniques which have recently been used measure the age of Shroud material, producing results that contradict the radiocarbon date.