Not seen these before but the premise is certainly interesting – heir hunter uncovering dastardly deeds in the past. The scope for stories in this vein is considerably large, especially considering how many real life ancestral tales revealed on rootschat are such eye openers.
On a more straight forward note may I recommend Damned Charity, a historical fiction Kindle e-book set in the East Midlands during the Great Cheese Riot of 1766.