It's actually quite difficult in my opinion to both write and read the last book of a series. I can only imagine how hard this book must have been for JLA but as a reader it was hard for me too. 
 Let's starts with the series in general, and let me tell you that this was a series that I adored. It made me a huge fan of JLA's and I have pretty much read everything she's written. But I do have my reservations when it comes to reading the last book in a series. I can only ever have two feeling: I'm sad because it's the end and I get really upset OR I'm upset because it wasn't a good ending and then I get angry because the whole series is ruin because of the ending. 
 I'm sad, guys, very sad! The ending was okay! Not too great, not too bad! Pretty good but not like say "Cloclwork Princess" ending. (That ending was perfect) this book in general was okay. There were some scenes with Arum that had me very interested and laughing my butt off. I pretty much laughed every time Daemon or Katy said something. Archer became a favorite. And I love that we got to see Serena and Hunter! Yaaaaay! 
 Still I felt the book fell slightly below my expectations of a good last book. The whole dilemma with the Luxen was solve rather quickly and there wasn't closer on what the heck happened to Los Angeles. What about those baby Origins? There are some loose ends that need to be tied together and maybe she did that on purpose? Maybe she's writing another book in that world? 
 Still I'm sad to see Daemon, Kat, Dee and even Archer & Luc go. It was good getting to know these characters.