Full Moon Killer London January 1960. The murder of a man at the beginning of the year at first glance appears to be a simple case for DCI Neil Goddard and his team to investigate but they are confused because inside the victims mouth is a slip of paper with strange markings and the letter A at its centre. When a month later another man is not only killed in the same manner but also has a similar slip of paper in his mouth, this time with a different letter Goddard realises that there is a double murderer roaming the streets of London. The case suddenly becomes personal when a letter addressed to him is found at the scene which makes it known that the killer knows of him but more worryingly that there will be five more murders in the coming months. Painstaking research into the pattern on the papers and the letters each contains leads to a hypothesis that the killer is killing his victims on the Full Moon days of the month for a specific reason: - but what is it? Even when he finds out the reason why the killings are taking place, who the murderer is and thinks he knows the names of the other victims it soon becomes a race against time to keep them alive but gradually the list continues to grow. When The Full Moon Killer and Goddard finally meet the outcome is not what either expected and when the truth emerges things are not as they seemed.