Sentence:  A similar tone of underlying futility and despair pervades the spy thrillers of Eric Ambler and dominates the most famous of <WSD>all</WSD> American mystery stories , Dashiell Hammett 's The Maltese Falcon . 
Meaning of the word marked with <WSD> tags:  quantifier; used with either mass or count nouns to indicate the whole number or amount of or every one of a class