Where to begin... Let me just say that as soon as I started reading United as One I exclaimed out loud "What the shit!?" (view spoiler)[So, Sarah is just DEAD!? John doesn't miraculously save her!? WHAT THE SHIT!? (hide spoiler)] That being said, I'm quite intrigued by the ending of the Lorien Legacies series. 
 The last three books in the series (The Revenge of Seven, The Fate of Ten, and United as One) have all been occurring within a day of the previous book. Essentially it's a huge war story split up over 3 books. It's easy to forget that the Garde are all teenagers. Their KIDS! By United as One, they are all fairly shell shocked. There is a difference between preparing for a hostile alien invasion/war and actually fighting in one. The prospect of losing starts to feel all too real to them, especially after the ending of The Fate of Ten where (view spoiler)[Sarah... WHAT THE SHIT!? (hide spoiler)] dies. At this point they just want it to be over, no matter what the cost. Obviously, they would rather be alive when the dust settles but if they have to die to end it, they will. United as One takes the Lorien saga to an even darker place than before. 
 The ending itself... It's somewhat open ended. Most of the characters we know and love are doing ok (view spoiler)[Some more than others... IE: 5 is FUBAR, Marina and John both have PTSD (hide spoiler)] or at the very least they are surviving. The world now has all these LANE'S and a school is being built to train them. ::cough:: X-MEN ::cough:: It seems a somewhat unstable set up. Not everyone is going to be cool with people having super powers and persecution seems likely. Right now though, it seems like everyone has the best of intentions at least. There are a lot of unanswered questions which leaves a possibility for a sequel series open. ::fingers crossed!!:: This isn't necessarily an happily ever after. But at least there is an after which is something to for which to rejoice. The future is unwritten... 
 P.S. (view spoiler)[ So maybe John and Marina, huh... Seems maybe destiny has bigger plans. I mean, Hello! their powers are even fire and ice! John and Marina are both my favorite characters so if they had to end up with someone, I'm ok with them ending up together. 
 I'm happy for Sam and Six. They always fit in that special way. Six is so fiery that she needs that calming center Sam provides to ground her. 
 I'm still shipping Nine and Ella, when she's old enough of course! 
 I hope Adam is ok. Maybe he will help rehabilitate more of the Mogs and maybe even find himself a nice girl.O MY GOODNESS! What about an Adam and Daniella ship! She's spicy enough to liven Adam up. I'm freaking out over something that hasn't happened but it would be so cool if it did! akf;sahf;!!!!!!!!! (hide spoiler)] 
 P.P.S. I WANT THERE TO BE A SEQUEL SERIES SOOOOOOOOO BAD!