***SPOILER ALERT!*** 
 In this book Elena becomes a Vampire who sire she doesn't know who exactly he is because she's taken blood from both Salvatore brothers. Katherine is back and ready to kill anybody who gets in the way between her and the Salvatore brothers. 
 Stefan, who feels destroyed and defeated, does his best to protect the new vampire Elena. Damon, who believes he finally has his Dark Princess in his arms, discovers that it will take more than a drunk new born vampire to fall in love with him. 
 The end of this book it kind of sad yes but it's predictable. I still enjoyed reading the series. It's pretty good.