The Secret Adversary by Agatha Christie — cover

The Secret Adversary

The Secret Adversary is a mystery novel written by Agatha Christie and first published in 1922. It is the author's second novel.

Tommy and Tuppence are two young men who want to have adventures and make a lot of money. One day they come across the case of the disappearance of the American Jane Finn and, in the hope of making some money, they set up a detective agency to solve cases like this.

The girl was carrying some important documents and boarded the Lusitania, which ended up underwater. Who is this mysterious Mr Brown? Will these two inexperienced detectives be able to solve the case?

The novel is the first appearance of this charismatic pair, perhaps overshadowed by other better known Christie characters such as Poirot or Mrs Marple.

"IT was 2 p.m. on the afternoon of May 7, 1915. The Lusitania had been struck by two torpedoes in succession and was sinking rapidly, while the boats were being launched with all possible speed. The women and children were being lined up awaiting their turn."

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Mystery Thriller Adventure Espionage Partnership Patriotism Identity Class

Public domain (US)·No sign-up·DRM-free·Real text, not scans

Pages
239
Reading time
6 hours 20 minutes
Pace
Intermediate
First published
1922
Language
English
Downloads
4,717

104 years later, still timely

Why Read The Secret Adversary in 2026?

Tommy and Tuppence sprint through postwar secrets with bright wit and real danger. Christie delivers a playful thriller—codes, disguises, and partnership goals, perfect for quick escapes.

Today's connection

Meet Christie’s most buoyant duo as they stumble into espionage and choose courage together. It’s brisk, charming, and proof that collaboration can be both clever and fun.

Adventure tone

Travel, clues, and lively detours.

Two-handed sleuthing

Chemistry becomes a tool, not a distraction.

Caper mechanics

Aliases, deadlines, and neat reveals.

Perfect for Mystery lovers Agatha Christie fans Readers interested in post-World War I settings

These collections include The Secret Adversary

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About the author

Portrait of Agatha Christie

Agatha Christie · 1890–1976

Ingenious plots and fair play clues that set the standard for mystery with crisp comedy.

24 books by Agatha Christie in the library →

If this one stays with you…