The Secret Adversary (Tommy & Tuppence, Book 1)

Their time is running out. Short on money, opportunities and – most importantly – adventure, Tommy and Tuppence embark on a daring get rich quick scheme. Their advertisement boldly proclaims that they are ‘willing to do anything, go anywhere’. But their very first assignment, for the sinister Mr Whittington, plunges them into more danger than they ever imagined...