The blackthorn key

Christopher, Tom, and Sally engage in a dangerous cat and mouse game with the Raven as Christopher attempts to finally unmask him.

In 1666, after four months away, friends Christopher Rowe, Tom, and Sally return to London triumphantly but, guided by coded riddles, face a conspiracy that threatens Christopher, as well as the King himself.

Christopher, Tom, and Sally engage in a dangerous cat and mouse game with the Raven as Christopher attempts to finally unmask him.