The Mountain (The Great Blue Above Book 6)

The penultimate novel in the Great Blue Above series follows the fiery ending of the Tunnel War. Survivors of the great battle deal with the eruptive fate of the City Below, and those living Above realize there's only one place to go to continue humankind: The Mountain, where descendants of One, Corp.'s founders have tortured and tested their remaining humans while vehemently defending their facility from the threat of outsiders. . .