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* Genre fiction accounted for 70% of all titles on Amazon bestseller lists in 2015 * Mystery/Crime/Thriller is the second highest selling genre for ebooks at 728.2 million in sales in 2015 * Mystery remains the most circulating genre in libraries with * Western mysteries growing in popularity * There has been a phenomenal rise in woman sleuths since 1980, with 360,000 titles featuring woman sleuths