The Secret AdversaryPaperback, 1 March 2022

Agatha Christie's first Tommy & Tuppence book is a thrill-packed novel of international intrigue, murder and suspense. Tommy and Tuppence who feature in three other Christie novels and one collection of short stories. Childhood friends Tommy Beresford and Prudence "Tuppence" Cowley meet and agree to start their own business as The Young Adventurers. 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.