Heartbreaking, action-packed, and hilarious, Gemina is one of the best books I have EVER read. 
 I cannot BEGIN to describe all of the emotions I felt reading this book. Many tears were shed. Laughs were abundant. Gasps were frequent. My spirit was brutally murdered, then lifted to the highest point possible, only to be brought to its knees again. 
 -- spoilers from here down -- 
 Okay. My thoughts are not coherent. I can try, though. 
 Gemina is SUCH A WILD RIDE. These are the most developed, intricate, and wholly human characters I have ever read about. Oh, my god. 
 Hanna is SO GREAT. I can't begin to express how in denial I was when, at the end, she was apparently killed. At that point, I had no idea if there was a sequel (there is one, BLESS), so no idea if it was final and that was that. Every time she did something great, I basically screamed. She is so kick-butt and sarcastic and wonderful. 
 Nik... my criminal dude. He is absolutely, one hundred percent on my top 3 fictional boyfriends of all time. maybe he's even #2. He's so hilarious and aaaa just AMAZING. It was highly probable that I cried when he- or Universe B Nik, I guess- died. 
 Ella is THE ABSOLUTE BEST. I somehow didn't cry when she got attacked by the alien thing. I legitimately don't have words to describe how wonderful she is. 
 Onto the plot: 
 Okay. I'm a sucker for a good plot, and I already had high expectations for this from Illuminae, but Gemina went above and beyond any expectations I could have ever set. The format was PERFECT for the story and I LOVED every bit of it. I was so excited for everything that happened, and I CANNOT WAIT for book 3. I honestly have no words to describe how wonderful this was. 
 To the faults: 
 Honestly, my only complaints are in the last 25 pages or so. I was (and still am) a bit confused as to what happened, but I imagine that'll clear up in the next book. That's literally my only complaint. 
 Final notes: 
 I know I wasn't coherent in this review, and this probably won't help in deciding whether you read Gemina or not. But if I could reach through the screen and tell you to read this book (and its predecessor, obviously) I would. I have no words. Love, love, all love for Gemina.