Ixeos: Book One of the Ixeos Trilogy

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, ...