Alone Tome 7
The lowlands

The cold war between the Campton group and Saul's clan has finally erupted into open warfare, but the increasingly strange events that affect the abandoned city eventually silence even the most bellicose instincts: the red zone is sinking into the ground, and all of the children, regardless of their allegiance, are now trapped inside the 'lowlands'. Their only chance to get out is to work together - if it isn't already too late...