Nightshade (Silent Scream Book 1)

A 2016 Kindle Scout selection.
When Iris is twelve years old, her mother is murdered. Six years later, the crime remains unsolved, and it's the sudden death of her estranged grandmother - as well as Iris's subsequent introduction to the prickly, yet entrancingly enigmatic Heathcliffe Monroe - that unlocks an even more complicated mystery. Between the lingering shadows of long-lost family secrets, and an overwhelming freefall into an entirely unexpected new world - the only guarantee that Iris has left is that there isn't one.