This is an omnibus so I'll review the three books separately. Overall I thought the characters were appealing and the setting (or most of it) was believable. I liked that the timeline started in the 80's and moved forward from there, basically making the characters my contemporaries.
The first book brings you into the world where witches and magic have a place, albeit a small one, in the world we live in. The family goes to stay in their newly inherited home in the country which makes an excellent setting for the weirdness that happens. My one complaint was that the second half of the book dramatically changes the setting and tone of the novel in a way I found discombobulating. I think I might have been happier if the story had even ended on a bit of a cliff hanger and then the author picked up in the new setting. The way it was it felt like she was trying to splice a wholly different story into the thing and it really didn't work for me. That said, I did enjoy the book and moved right into the next one.
Of course with this book I started out disappointed. I'd gotten so used to the voice of the main character from the first book that when the author introduced someone else as the teller of the tale I was annoyed. The good thing was that the book shifted in the middle again, rather abruptly and we were back to Fern's perspective. Overall again I enjoyed the story and the characters, but wanted a little more consistency in the writing style.
The final book was perhaps my favorite. The horror aspect built from book to book to culminate in an appealing way in this story and there was no jarring transition halfway through. The ending was surprising to me, but satisfying. Overall an enjoying read.