Strange old house. Mysterious basement. Weird herbalists. Odd baked goods. Plane crash survivor. Twins! All the ingredients needed for a great spooky tale. 
 Airline pilot Chip Linton survived the crash that killed 39 of his passengers. In the aftermath, suffering from debilitating PTSD and survivor's guilt, Chip moves with his wife and their twin daughters to the isolation of an old house in rural New Hampshire. There, they are welcomed with open arms by a local group of self-described "herbalists", whose enthusiastic interest in the family, and especially the girls, becomes downright creepy. 
 Author Chris Bohjalian does a great job juggling multiple characters and points of view, and gives just enough hints to keep the reader guessing without giving too much away up front. I had a hard time putting this book down, and definitely didn't expect the ending. 
 Reminded me, in all sorts of strange ways, of "American Horror Story", "Rosemary's Baby", "Her Fearful Symmetry", and any number of great ghost stories. Highly recommended.