I almost gave this one star. I changed my mind because maybe this is a little bit about feelings rather than any good analysis of the writing and story.
This is a cross between a Nancy Drew and a Harlequin romance. Both of those have entertained me in the past. I was expecting more from the cover and blurbs. (I know, I know). The mystery isn't much and I should pay a little respect to hard it is to write a suspense/mystery novel. This one suffered from being able to see where the writer would have to sew up the plot.
One of the ways to create a mystery is to start with an answer and work backwards to add red herrings and stuff. The issue with that way is that if there is a lot of clunk in the delivery then the reader can see the answer more clearly. This book suffers from that.
Now, had the author dropped one of the characters growing poisonous plants, I may have not figured it out. That isn't a spoiler, hopefully.
The second issue is the use of the Appalachians. I am not sure that I buy the treatment of some of the people living there. It doesn't feel like a small town. Or if it does, it is closer to Cabot's Cove than other places.
Regardless, it is a mildly pleasant romance with an unsatisfying mystery. I do think that it would serve some folks as a good read, so I changed my opinion slightly.