The Harlequin's warning to Anita Blake is presented in a gift EL left where she'd be sure to find it. Inside, carefully wrapped n folds of pristine tissue paper, is a white mask, utterly plain. The fact that it's white, Jean-Claude tells her, is the good news. White means they are only being observed.
The flow of power that connects Anita Blake with Jean-Claude, =spire Master of the City, and with Richard, Ulfric of the were-selves, has been growing and changing, increasing exponentially. Their power seems to have attracted attention, and it's a kind of attention no one would desire. Jean-Claude and Richard need to be gong allies now. Nathaniel and Micah need to give all their love and aid. And Anita will need to call on Edward, whose utterly human ruthlessness in her defense makes him the right man for the job.
Anita Blake has the authority to pass judgment on vampires. The Harlequin have the authority to pass judgment on her. It is forbidden to speak of The Harlequin unless you've been contacted.
And to be contacted by The Harlequin is to be under sentence of death.