4.5/5 stars 
 I really enjoyed Gemina, and I loved Hannah and Niklas as our main characters, but I think I loved Ella even more!! (view spoiler)[She was so witty and smart and I was screaming throughout the novel for nothing to happen to her. Speaking of ends, OH MY GOSH THAT ENDING! I really thought Ella would stay behind me/be left behind, but then Jackson "saved" the day/somewhat "redeemed" himself. Don't get me started on how much I hate Jackson ugh, I was a bit skeptical of him from the start. It annoys me so much how he blantantly lied to Hannah about his identity all for some stupid corporation that intends on killing everyone and everything in its sight for its own sake (sorry/not sorry for that mini rant). I loved how Hannah swooped in at the end, I was honestly convinced that the Heimdall group had diedand Hypatia was all on its own" (hide spoiler)] 
 I ABSOLUTELY LOVED THE ILLUSTRATIONS BY MARIE LU. HONESTLY ONE OF THE ONLY REASONS I ASKED FOR THIS BOOK FOR CHRISTMAS INSTEAD OF BORROWING IT FROM THE LIBRARY WAS FOR HER ILLUSTRATIONS, THEY WERE GREAT. AND ALSO LIKE ILLUMINAE, THIS COVER AND THE ACTUAL BOOK'S COVER WAS FLIPPING FANTASTIC! 
 My reason for docking Gemina half a star is that the plot was a bit hard to follow at times. I think it mainly came from the different styles of reading/information featured in the novel, but it usually cleared up by the end. 
 I love how we get to interact with the characters from Illuminae and it's so interesting how the two novels intertwine..Overall, I really enjoyed this installment of The Illumine Files and I look forward to the last book in this trilogy!