Yes, I read the sequel. It did get better, though the sexual current between Harper and Tolliver continues to flow.
In this book, Harper is hired by an anthropology professor to demonstrate her dead body-finding abilities to his class. Confident that he'll prove her to be a phony, the prof is amazed to find Harper can identify every body in an old graveyard. With one shocking discovery. One grave contains an extra body, that of a young missing girl whom Harper had tried to find two years previously. You guessed it, Harper and Tolliver are forced to stick around to be hassled by police and locals until the whodunnit case is solved.
It's an entertaining read. Kind of on the dark side, which is how I like 'em.