Terrorism -- Prevention -- Fiction. London (England) -- Fiction. Suspense fiction Heathrow Airport (London, England) -- Fiction.

Security guards -- Fiction. Murderers -- Fiction. Families -- Fiction. Suspense fiction

Allon, Gabriel (Fictitious character) -- Fiction Intelligence officers -- Fiction Art restorers -- Fiction Corsica (France) -- Fiction Suspense fiction

Assassins -- Fiction Assassination -- Fiction Betrayal -- Fiction Intelligence officers -- United States -- Fiction Suspense fiction

Undercover operations -- Fiction. Islamic fundamentalism -- Fiction. Terrorism -- Prevention -- Fiction. Suspense fiction Spy stories

Dante Alighieri, 1265-1321 Langdon, Robert (Fictitious character) -- Fiction Cryptographers -- Fiction Florence (Italy) -- Fiction Adventure fiction

Intelligence officers -- Fiction. War on Terrorism, 2001-2009 -- Fiction. Germany -- Fiction. Suspense fiction Spy stories.

Dreyfus, Alfred, 1859-1935 -- Fiction Picquart, Georges, 1854-1914 -- Fiction Intelligence officers -- France -- Fiction France -- History, Military -- Fiction Spy stories

London (England) -- Fiction Suspense fiction

Catholic Church -- Fiction Policewomen -- Italy -- Venice -- Fiction Murder -- Investigation -- Fiction Venice (Italy) -- Fiction Suspense fiction

Undercover operations -- Afghanistan -- Fiction Hostages -- Fiction Suspense fiction United States. Central Intelligence Agency -- Fiction

Private investigators -- California -- Fiction Private security services -- California -- Fiction Mystery fiction Suspense fiction