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,
Dead Boy Detectives meet for the first time. The story and characters are clearly a macabre spin on two genres of British children's fiction - boarding school literature and teenage detective stories. Gaiman revived the characters in the "Children's Crusade" Vertigo's first and only crossover event which ran through all that year's Vertigo annuals that were published between December 1993 and January 1994. Gaiman wrote the two "Children's Crusade" bookend annuals which prominently featured both characters and first gave them the official title the "Dead Boy Detectives". The characters also appeared in a "The Books of Magic" short story in "Winter's Edge #3",