Cirrus@Austlit

'It is eight years since Xuan Wu, God of the Northern Heavens, living in Hong Kong as wealthy businessman John Chen, was exiled from the mortal realm. Emma and Simone, John's daughter, are facing a new series of threats, while their best fighter, Leo, sits in Hell. They must persuade him to come home ... but, in Hell, nothing is as it appears.

On Earth, Simon Wong, the Demon King's son, is no longer around to trouble them, but his associates have taken over Simon's underworld activities. The otherworldly stones are being targeted and are in danger of their kind being completely destroyed.

It seems that the Demon King is the only one Emma can turn to for help ... ' (Publisher's website.)

'Emma teeters on the edge of becoming fully demon, and must make a journey to the Kunlun Mountains in the West, home of the the reclusive goddess Nu Wa, in an attempt to regain her humanity.
Travelling with Emma is Xuan Wu's daughter, Simone, who is struggling with her growing powers and trying to defend herself from the demons who want to destroy her.
And Michael is trying to come to terms with the shock of finding out he might be half demon...and a danger to them all.' (Publisher's blurb)

'Human and demon, heaven and hell battle for the fate of the world in this fabulous bestselling series ... The demons that could control stones and elementals have been defeated, but the most powerful of Simon Wong′s associates still remains to create almost undetectable copies of humans and Shen. This demon allies with Kitty Kwok to prepare a torturous trap for Emma and Simone from which they may never return.Wudang Mountain is enveloped by dark foreboding as Xuan Wu begins to reappear -- sometimes human, sometimes turtle, but always without memory. Emma and Simone are in a race against time as they try to rescue Xuan Wu ... before the demons capture him.' (From the publisher's website.)