The Kindle Daily Deal for November 4, 2012:
From the promotion:
"From the murderous rise and fall of America's bloodiest Asian gang to the brutal lives of the New York City mobsters who ruled Hell's Kitchen, reality is often more thrilling than fiction. Today's selection of five true-crime stories hammers home this point, and they're just $1.99 each (up to 88% off)."
Pretty well reviewed (3.9-4.7 stars for the collection).