** spoiler alert ** 
 I really loved this book, and was excited by the return of Thayer. I am also happy that Emma and Ethan were able to work everything out, and finally come out to the public as a couple. 
 My theory on who killed Sutton? Garett. He is just always lurking around, and if it's revealed that he found out about Sutton seeing Thayer behind his back, then that would give him a motive. 
 I can not wait for the next book, and I hope we find out who the murderer is soon.