If you haven't yet read TRC, I can say with full confidence that you should do it now. 
 I couldn't have asked for a better, more heartfelt, or more exciting ending to this series than the one Maggie Stiefvater delivered with The Raven King. I adore Blue and her psychic family, Gansey and his big heart, Ronan and his pure ferocity, and Adam, the most loyal and brilliant magician in the whole story. Every character feels dynamic and alive - even Piper Greenmantle, whose supreme selfishness made me laugh as often as it frightened me. 
 Without spoiling anything, I can say that the plot revolves around the characters we've come to know and love. It meanders from Blue to Gansey to Adam to Ronan, but it isn't limited to just them. Every character shares the limelight in this final novel of the series. Ordinarily, I prefer one or two characters in a multi-POV novel. But with this book, I appreciated every perspective. We follow the teens as they continue to search for Glendower and are thwarted by all kinds of threats - self-obsessed Piper Greenmantle, mysterious magical artifact dealers, and dark, dire forces within Cabeswater. Despite the chaos, Blue, Gansey, Ronan, and Adam begin to realize their own individual brands of magic, and how they can help one another with it. I really appreciated that as their confidence within themselves grew, so did their relationships with each other. 
 There are so many things I want to know about this cast of characters, and I hope that in time we'll get more of this fantastic series. Even if we don't, though, I'm satisfied with the creepy, hilarious, nerve-wracking final installment of TRC. I can honestly say that I have enjoyed every single page of this series, and as sad as I am to see it end, I'm also so happy to have gone along for the ride. 
 Thank you, Maggie Steifvater.