Resident Evil: Underworld (Resident Evil Series #4)

Beneath the deserts of the American Southwest, one of the Umbrella Corporation's most elaborate facilities is about to go online.

Somewhere inside may also be the key to stopping Umbrella once and for all... can Leon Kennedy, Claire Redfield, Rebecca Chambers, and their friends can get past a strike team of corrupt S.T.A.R.S., and survive the genetically engineered horrors awaiting them?