Pwy yw Moses John?

Pwy yw Moses John?
A gripping detective novel by a popular author. 1997 is a year of great change on the islands of Britain. In Aberystwyth, it's a traumatic year for Moses John who wakes up in hospital with no memory of the last seven years. He learns that he was the chief detective on a murder case and his attempts to catch the murderer forces him to ask - who am I?