Book by Roberto Saviano on Neapolitan organised crime (8)
I believe the answer is:
gomorrah
(Other definitions for gomorrah that I've seen before include "Wicked Biblical cities Sodom and . . . . . . . ." , "Twin city of Sodom" , "wicked place" , "Old Sin City by the Dead Sea" , "Biblical town twinned with Sodom" .)