The Secret Adversary The Secret Adversary The Secret Adversary is the second published detective fiction novel by British writer Agatha Christie, first published in January 1922 in the United Kingdom by The Bodley Head and in the United States by Dodd, Mead and Company later in that same year. The UK edition retailed at seven shillings and sixpence (7/6) and the US edition at $1.75. The book introduces the characters of Tommy and Tuppence who feature in three other Christie novels and one collection of short stories; the five Tommy and Tuppence books span Agatha Christie's writing career. The Great War is over,
Partners in Crime (short story collection) and Tommy will go the ball in costume to investigate. They will act as the detectives Tommy McCarty and Dennis Riordan. At the Ace of Spades, the Beresfords sit in a private booth and peer through the door at the various other costumed and masked patrons. The booth next door is soon taken by a woman dressed as Alice's Queen of Hearts and a man outfitted as the gentleman dressed in newspaper. After a while, they hear a cry from the woman followed by the man laughing and then see him leaving. After a few minutes, suspicious, Tuppence makes Tommy