Mark of the Crescent

h2>Millions of copies sold worldwide. The author of the Department Z novels is back.</h2><br />The mark of the crescent signs an order for murder. <br />Gordon Cragie and Department Z are embroiled in a desperate investigation involving drugs and large scale murder. How will the Department uncover who is behind the mysterious mark? Will they solve the case before the anonymous culprit claims another victim?<br />The trail starts at the country estate of Greylands, but where will the mark of the crescent lead them?