The Secret Adversary (Tommy & Tuppence Mysteries)

Tommy and Tuppence, two people flat broke and out of work, are restless for excitement. They embark on a daring business scheme - "Young Adventurers Ltd." - "willing to do anything, go anywhere." But their first assignment, for the sinister Mr. Whittington, draws them into a diabolical, political conspiracy. Under the eye of the elusive, ruthless Mr. Brown, they find themselves plunged into more danger than they ever imagined.