This is quite a good novel. It's scary in an understated way that makes it even scarier. Add in the elements of sexism and the paternalistic manner of members of professions that see themselves as the sole keepers of reason, and this novel leaves the reader feeling just as trapped as the characters. 
 It feels a bit like an alternate ending to Downton Abbey, only I never felt the need to leave the lights on after watching Downton Abbey.