Underuniverse (e-book)

Europe, 2665 A.D. For Julian O'Mallaghan, the past six months have been a dream. Not only was he accepted into the Amsterdam City Army, but his girlfriend, Kim, has been inseparably by his side. But then both go on an evening patrol and things go thoroughly wrong. 

An underground eruption with the epicenter at the old Doel nuclear power plant, in Antwerp, opens a network of passageways throughout the Netherlands and Flanders. The creatures that emerge from them are stranger than anyone has ever seen. 

At first it is just a strange phenomenon, but then these creatures get hold of Kim, AND seem to target Julian.

Underuniverse is a futuristic Young Adult thriller.