Pwy yw Moses John?

An exciting detective novel by a popular author. 1997 is a year of great change in the British Isles. In Aberystwyth, it is a shocking year for Moses John as he dies in hospital with no memory of the past seven years. It is learned that he was the lead detective on the case of a murderer who was responsible for killing three young men. His efforts to catch the killer force him to ask - who am I?