Danni is just your everyday modern teenage girl in Southwest England: she goes to school, hangs out with her mate Levi, is always wearing mascara, has the separated parents YA trope, doesn't get on with her mum and is hellishly embarassed by her hippy dad. Everything's normal until her mum goes missing, and some people in the little village where her dad takes her to live are more than a little odd. They're downright hostile, and Danni can't figure out why until pieces start falling into place as to what exactly happened to her mum and that there might be more to her family than meets the eye...
First things first, this is definately the lower end of YA. It's clean and simple; Deep Water it may be, but the character emotions and relationships are kept shallow. If you want something deep and meaningful as an older reader, this is not it. It is a very good read for the intended 12+ age group, full of mystery, suspence, realistic teen characters (not prone to YA trope angst-tantrum moodswings!) and creepy details based on Cornish folklore.
The protagonists are likeable, the antagonists suitably menacing in their own special way (someone reviewing mentioned "The Wicker Man" for good reason). Danni, Elliot the love interest and Levi the best friend are a good trio with believable dialogue and interactions. Romance is in the air, but it's of the sweet rather than the sickly or steamy varieties that turn up on YA.
If it's a good supernatural mystery for younger teen readers you want, then this would fit the bill. It's certainly nice to read something in the genre that is so very rooted in the British Isles!