I have really enjoyed this series. Briggs is one of my favorite authors. Up until now, all of the Mercy books have been 4 stars bordering on being amazing/5 stars. 
 Silver Borne wasn't that for me, barely reaching 3 stars. Although enjoyable, it just didn't have that *wow* factor to propel the story into the 4 star range. It was nice to walk around in Mercy's head for a while, but some elements in the book really bothered me. 
 To start the plot of the book off, Mercy receives a call from Tad, Zee's kid. He sets her down the path of checking in with Phin who had given her a book about fae in one of the previous books. Mercy looks into it and realizes that Phin is mysteriously gone. 
 **If you haven't read the previous 4 books in this series, you might not want to read below this line. You've been warned. :-D** 
 As a side plot, Mercy finds out that Samuel has gone from whacked and depressed to seriously-life-threatening whacked and depressed. 
 Let's talk about Samuel's emotional state: if you've read the previous 4 books you know he was headed for a breakdown, hell all the signs pointed in that direction. I expected it and had Briggs not addressed it I would have moaned and cried about no character growth/change for Samuel. 
 While Mercy shows her concern for Samuel and her shock at his new emotional state, she doesn't ever once really treat Samuel as anything other than Samuel as she knows him: mostly emotionally whole and not willing to hurt anyone unless they deserved it. Even though he's broken inside... and she's warned about what will happen ... she still thinks he's trustworthy. So, he's still deemed safe 'enough' to take everywhere like a puppy and not just by her, but by Adam, her fiance, too. I'm not saying she can't take care of herself, however, it was silly to court disaster on purpose. 
 Okay, so I think that they are gonna be stupid about it and trust him... I can go with where this is headed...I totally expected their trustworthiness of Sam's wolf would lead them down the path of self-destruction, I mean... it was set up... and we were told.. LOTS of times about what happens to a werewolf if the wolf is left in control. But, instead a new character is intro'd at the end of the book to solve not only Sam's problems, but save the 'day' and help solve the plot of the book. 
 Briggs tried to give this character some depth, she tried to show that this was a person with a past etc., but that's pretty hard to do with only 1/3 of the book left. Because of the introduction of this new character, I felt like there was no tension and no conflict left. 
 What I thought was a logical conclusion of decisions that both Mercy and Adam made reguarding Samuel, wasn't going to happen and I just knew that this new character was gonna wrap up the rest of the novel in a pretty red bow. 
 So, while the journey with Mercy to the end of the story was fun and entertaining, even if I did look at her puzzeled b/c of a few silly decisions, the ending lacked the punch of the previous 4 books and this one feels consequence-less. 
 I worry that maybe Briggs likes her characters too much now, to really put them through the wringer. The ending scenes leave out most of the detail about any thing Mercy may have suffered at and hands of the enemy, maybe this is why I feel there have been no consequences B/C there was no suffering at the hands of the bad guy - so the bad guy didn't really seem that scary. Briggs didn't pull any punches when Mercy was raped in a previous book, so I'm not sure why she pulled the punches here and that's totally what it felt like.