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The truth of French Crime Fiction series is death. Not Detection or investigation, not mystery, and not Police. What the series are about really, is death. Or at least, this is what data visualization suggests, based on the titles of one the most successful of these Series.  The three graphs presented here represent the top most frequently used words in the 2075 titles published in the  Fleuve Noir Spécial-Police Series, between 1949 and 1987.

The 13 most frequent words have been translated in the circle chart above. The Worcloud below, generated with Voyant, and the word -trends graph below, are based on the same source.  They present the same words, albeit with  some  more of the words most used in the titles (below),  and in their original French.

(Click to enlarge)

(Click to enlarge)