Andreas D. Hesse:  Glowshadow

Alex and Sonja are the children of one of the mightiest magicians ever to walk the earth. Their worst enemy has succeeded in using Alex’s powers to open a door between two worlds - and now everything is changed. There is no electricity, earthquakes and volcanic eruptions create mayhem, humans are attacked by creatures escaped from the shadow world. Even the Golden City, one of the few safe havens, cannot guarantee shelter much longer. While organizing the defence of the city Alex is taken prisoner and abducted to the shadow world. Then Ethan, a young prince, whom Sonja trusted as an ally, turns out to be a traitor. He permits the creatures of the dark to gain access to the very heart of the Golden City ...

„An incredibly gripping and enticing book that invites the reader to plunge headlong into an unknown world. Once you’ve started reading it, the book is hard to put down again. Don't miss out!“ jungekritiker.de