The Darkworld is open, and nothing will ever be the same.

Reeling from recent events, Ash and her friends are forced to flee Blackstone. With their former allies dead or missing, their only hope lies with another group of sorcerers who've risked their lives to learn the truth about the Darkworld. But the group have an agenda of their own, and with no Barrier left to contain the demons, nobody is safe from corruption.

Ash must unravel one final mystery if she is to defeat Lucifer and Mephistopheles for good. But the truth lies within the Darkworld itself, and even if she survives the journey, there may not be anything left to return to…

A nail-biting upper YA paranormal series for fans of Cassandra Clare, Jana Oliver, and Holly Black.