** spoiler alert ** 
 This book is a hard one for me to grade. I'm so uncomfortable with Clare and Russ' relationship. And I think we're supposed to be. Clare and Russ are uncomfortable with it. At the same time, I'm on the edge of my seat trying to figure out how they will possibly work this out. 
 The mystery was good, I think, but very secondary for me to Clare and Russ' story unfolding. I think if I'd known at the beginning of the series that there would be infedelity (even if it's mainly emotional) I think I wouldn't have started the series. Now there's no way I'd stop. I'm curious about how they will work this out. Clare and Russ are very moral characters and this is an awful situation to work out. 
 To me, this has to be excellent writing. A writer who can keep me reading a story that's uncomfortable has to be very skilled.