The Secret Adversary

The Secret Adversary
Dust-jacket illustration of the first UK edition
AuthorAgatha Christie
Cover artistErnest Akers
LanguageEnglish
SeriesTommy and Tuppence
GenreCrime novel
PublisherJohn Lane, The Bodley Head (UK)
Dodd, Mead and Company (US)
Publication date
January 1922 (UK)
Publication placeLondon, United Kingdom
New York, N.Y., United States
Media typePrint (hardback & paperback)
Pages320 (first edition, hardback, UK)
330 (first edition, US)
OCLC3672395
Preceded byThe Mysterious Affair at Styles 
Followed byThe Murder on the Links 
TextThe Secret Adversary at Wikisource

The Secret Adversary is the second published mystery novel by British writer Agatha Christie, first published in January 1922 in the United Kingdom by John Lane at 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. They are hired for a job that leads them both to many dangerous situations, meeting allies as well, including an American millionaire in search of his cousin.

Reviews were generally positive on this adventure, which manages to keep the identity of the arch-criminal secret to the very end.