From the description:
"Fast-paced and chillingly detailed, these expertly researched historical thrillers follow the adventures of a hangman and his tenacious daughter. In The Hangman's Daughter, the pair investigates a murder and allegations of witchcraft, while The Dark Monk finds the two hunting an ancient treasure."
These are at a rare (now) $0.99 price point. Good reviews, 3.7 and 4 stars for the two books, which are both part of the Kindle Owners Lending Library, so Prime members could get these as a free loaner of a month