DeLillos genierklærte storverk om USA under den kalde krigen. Sagt om boka:
A magnificent book by an American master (Salman Rushdie).
It gets the human condition (Observer).
One of the finest of the century (Scotsman).
The Novel of the '90s (Time Out).
The black comedy of the cold war (New Yorker).
One of the defining novels of the post-war period (Irish Times).
Underwolrd is a bible, a manifesto (Big Issue).
An American Classic (Elle).