Underworld (Resident Evil #4)

The Underworld Initiation: A Journey Towards Psychic Transformation (Celtic Muth & Legend, V. 3)

Dictionary of the Underworld

Empress of the Underworld (Seven Sleepers Series , No 6)

UNDERWORLD

Confessions of a Yakuza: A Life in Japan's Underworld

Johnny's Girl: A Daughter's Memoir of Growing Up in Alaska's Underworld

Approaching Zero: The Extraordinary Underworld of Hackers, Phreakers, Virus Writers, and Keyboard Criminals

Eurydice in the Underworld

Working Sex: An Odyssey into Our Cultural Underworld