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Mystery, Thriller & Suspense is the second-highest selling bestseller list on Amazon Kindle. We recently examined more than 120 sub-markets in the segment, and one sparked our interest in particular: Serial Killer Fiction.

The serial killer fiction Kindle category has shown an impressive sales rank improvement over the last four years. The average sales rank across the Top 20 titles rose by more than 50% during the previous 18 months alone.

What is the magnitude of Serial Killer Fiction book sales on Kindle and its relevant categories?
What has been the sales trend for Kindle categories for Serial Killer Fiction over the last 30 months?
What is the level of competition for books featuring Serial Killer Fiction in various categories?
What does our “virtual bestseller list” for Serial Killer Fiction look like?
What categories do the bestselling Serial Killer Fiction e-books use for optimal visibility?
Which of these categories offer the best ratio of books sold vs. level of competition?
What does top-selling cover art look like that you should show to your cover designer?
What sub-segments/tropes earn the highest royalties in the market?
Who are the top-performing authors in our cross-category Serial Killer Fiction bestseller list?
Who are the leading publishers in the Serial Killer Fiction segment right now?
What is the typical book page length of top-performing titles that readers expect?
What are the trending search words (keywords) used by Kindle readers on Amazon for this genre?
What are the most frequent words in top-selling book titles and book descriptions?
What are the proven price points that are used in the genre?