The Mark of the Crescent

After the sudden murder of a man at a cricket game, a mysterious omnipresent organisation known only as the Mark of the Crescent catches the attention of Department Z. The strange attacks are increasing in frequency and the mark is everywhere. Starting at the country estate of Greylands, chief Gordon Craigie and his team of agents are hot on the trail of the organisation's leader.

But where does the trail lead? And can the Department find out before it's too late?