Tunnel: Book One of the Subterranean Series

Mankind is about to meet the most advanced race on the planet.---------------------------------------------------------------------------Sergeant Julie Porter didn't ask to be reinstated, nor did she ask to be reunited with her old squad--a specialized unit inside of the already specialized Delta force. But the army needs Julie's unique skills for a unique mission, and, unfortunately for her, they aren't giving her a choice.The job: rescue the civilian staff of a submarine base located two miles beneath the Atlantic ocean. It wasn't meant to be a combat mission, but Julie and her team are ambushed the moment they arrive. Outnumbered and outgunned, they retreat into the Azores Fracture Zone, a network of endless caves that descends to the very core of the earth. Cornered, with no hope of escape, Julie battles a Terran race never before encountered by mankind.