Hercule Poirot, the renowned Belgian detective, is the protagonist of Agatha Christie's 'Murder on the Orient Express' and is responsible for solving the murder mystery.

SPECTRE (Special Executive for Counter-intelligence, Terrorism, Revenge, and Extortion) is the criminal organization led by Ernst Stavro Blofeld, which James Bond must infiltrate and dismantle in 'Casino Royale'.

Alec Leamas is the British intelligence officer who is tasked with infiltrating the communist regime in East Germany in John le Carré's 'The Spy Who Came in from the Cold'.

The Maltese Falcon is the valuable statuette that Sam Spade is hired to find in Dashiell Hammett's 'The Maltese Falcon'.

Philip Marlowe is the private investigator who is hired to investigate the disappearance of a wealthy general's daughter in Raymond Chandler's 'The Big Sleep'.

Bruno Antony is the psychopathic young man who proposes a murder swap with a complete stranger in Patricia Highsmith's 'Strangers on a Train'.

Holly Martins is the British writer who travels to post-war Vienna to investigate the death of his friend in Graham Greene's 'The Third Man'.

Henry Faber is the German spy who is sent to England to assassinate Winston Churchill in Ken Follett's 'Eye of the Needle'.

Richard Hannay is the British agent who is tasked with preventing a secret society from stealing military secrets in John Buchan's 'The Thirty-Nine Steps'.

Charles Latimer is the British intelligence officer who is sent to investigate the death of a mysterious Greek businessman in Eric Ambler's 'The Mask of Dimitrios'.

Harry Palmer is the British intelligence agent who is tasked with investigating a missing scientist in Len Deighton's 'The Ipcress File'.

The Jackal is the professional assassin who is hired to assassinate the President of France in Frederick Forsyth's 'The Day of the Jackal'.

Jason Bourne is the amnesiac assassin who is trying to uncover his true identity in Robert Ludlum's 'The Bourne Identity'.

Captain Marko Ramius is the Soviet submarine captain who defects to the United States with his nuclear-powered submarine in Tom Clancy's 'The Hunt for Red October'.

Mitch McDeere is the young lawyer who discovers that the prestigious law firm he works for is a front for a criminal organization in John Grisham's 'The Firm'.