Agatha Christie 
Secret Adversary [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The very faint anxiety which underlay his tone did not escape the astute ears of Miss Prudence Cowley, known to her intimate friends for some mysterious rea son as Tuppence. She pounced at once.