IXEOS by Jennings Wright
The McClellands are enjoying a lazy summer vacation at the beach when they are lured from our world into Ixeos, an alternate Earth. Finding themselves lost in a maze of tunnels under Paris and surrounded by strangers, they discover that they have been brought to Ixeos for one purpose: to take the planet back from humanoid aliens who have claimed it. With the aid of the tunnels and a mysterious man named Landon, the teens travel the world seeking the key that will allow them to free Darian, the long-imprisoned rebel leader.
The aliens aren’t the only problem on Ixeos — the McClellands have to deal with brutal gangs, desperate junkies, and a world without power, where all the technology is owned by the aliens, and where most of the population has been killed or enslaved.
The worst part? There’s no way home. Continue reading