I loved Shiver. It was a beautiful heart wrenching story. I guess that after Linger, I just gave up with this series until I went to Oxfam and found a used copy for just 1 pound. I bought it and then I gave this book a chance. I wanted to know the end of Sam and Grace's story. 
 However, there's not a resolution. Most storylines are left for you to decide the end. I would be fine with this if I had gotten a better grip of the character. I get why Sam (who stole my heart in the first book), is still traumatized by his past, but I didn't buy the harsh response to Grace's parents. While they were telling EVERYONE that they were werewolves, Grace didn't want to share it with her neglecting parents. I thought she was being so harsh that made me sad. I get it, but I felt so extremly bad for her mother that I disliked how she handled everything. Grace is supposed to be "mature" but here she was just being obnoxious and mean. "I will talk to you after I turn 18". I am her mother and I would slap her because she has been missing, supposedly dead, and... ughh. Worst of all, I get why she reacts like that. 
 I wanted an end to the series. I really wanted one. Maybe more tragedy, maybe less convenient plot solutions. It lacked important points of resolution, like the peninsula which was easily given away (and Sam and Grace still doubted was a good idea. If they had been more decisive, maybe that scene in the woods would have been avoided) or the medicine which in my mind made no sense. Especially because the great scientist was Cole who is a rock star who hasn't gone to college and knows science because of his dad??? (don't remember if they explained it in Linger). But my point is: Even if my dad is an engineer, that doesn't make me one. It's not a genetic trait. 
 Moreover, I wanted more scenes with Sam and Grace. More of what made me fall in love in Shiver. Their relationship seemed to be in turmoil. The future made it bleak. When Grace asks Sam out of the blue if he is going to marry her, I was... WTF? You're not even 18! You are a werewolf. You need to save the pack. What kind of question is that? I detest when teens want to get married so soon (but just my taste, teens, do whatever you want, marry like Romeo and Juliet and see how it goes). Anyways, sometimes their internal dialogues depressed me. I realized that Forever was kind of depressing and not in a beautiful melancholy way as in Shiver. I was depressed because of the wolf situation, how selfish humans are.