The Secret Adversary

A missing document, a dangerous conspiracy, and two young adventurers drawn into a deadly international mystery.

Agatha Christie introduces one of her most beloved detective partnerships in The Secret Adversary, a thrilling tale of espionage, intrigue, and hidden identities. Set in the aftermath of World War I, the novel follows childhood friends Tommy Beresford and Tuppence Cowley as they seek adventure and become entangled in a perilous mission to locate a mysterious woman linked to a missing government document. As they navigate a world of spies, political plots, and shifting loyalties, the pair must uncover the identity of the elusive “Mr. Brown” before it is too late. Blending suspense, romance, and adventure, this early Christie novel reveals her remarkable talent for creating fast-paced stories filled with twists and surprises.

• First published in 1922
• The first novel featuring Tommy and Tuppence Beresford
• A classic spy thriller showcasing Christie’s versatility beyond traditional detective mysteries

Available in multiple formats:

Paperback — Elegant print edition presenting the complete, unabridged text, and ships in 3–5 business days.
Hardcover — Elegant print edition presenting the complete, unabridged text, and ships in 5–7 business days.
EPUB — DRM-free, compatible with Kindle, Kobo, Apple Books, and all major e-readers. Instant download after purchase.
Audiobook — Professionally narrated, complete, and unabridged. Available on Audible, Spotify, Apple Books.

A captivating adventure of mystery and espionage that reveals a different side of Agatha Christie’s imagination and her extraordinary ability to keep readers guessing until the final page.

About the Author

Agatha Christie (1890–1976) was an English novelist and playwright widely regarded as the greatest mystery writer in history. Best known for creating the legendary detectives Hercule Poirot and Miss Marple, Christie wrote more than sixty detective novels, including Murder on the Orient Express, The Murder of Roger Ackroyd, and And Then There Were None. Her ingenious plots, unforgettable characters, and masterful use of suspense have made her the best-selling fiction writer of all time, with billions of copies of her works sold worldwide.