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,
Copyright protection for fictional characters faire" doctrine holds that those scenes or aspects that are indispensable to the story or are standard expressions cannot be copyrighted. This limitation also applies to fictional characters. Therefore, stock characters or archetypical and hackneyed elements are disqualified from protection by virtue of the fact that they are not unique in their expression. In cases of copyright infringement of a fictional character, a two-step test developed by the American Courts has to be satisfied. Firstly, it must be established that the character in question is capable of being copyrighted. Secondly, it must be demonstrated that there has been an infringement