I am so happy to finally have the chance to finish this one! I have heard so many wonderful things about Obsidio book #3, and really wanted to get to it to see how this series ends.
For me Gemina was almost as good as Illuminae. I didn't love the new characters as much as I did the previous characters, Kady, Ezra and AIDAN. AIDAN being my favorite. It's not that the old characters were excluded from this story, they all pop up in Gemina, but we see a whole lot less of them. Gemina revolves around new characters, Hanna and Nik.
Hanna eventually grew on me (much like Kady did). She was pampered and a tad too over confident and I just didn't care too much for her through most of the book. I found Nik to be mostly likeable. Ella the hacker is a great character and probably my favorite of the new cast.
At one point I felt that my emotions were once again being manipulated in a similar fashion as in Illuminae, but this time around I didn't panic. I had a feeling the authors were toying with my feelings again and, thankfully, they were. Repeatedly. Such cruelty.
There was a ton of action, enough to keep you on the edge of your seat and plenty of twists and turns. One of my favorite things about this series is the format. You have so many interesting illustrations, reports, messaging conversations, video footage and the like. It's never repetitive and keeps you turning the pages.
I will avoid discussing the plot because it's too easy to spoil so I will just say, this series has to be one of the most unique I have ever read. I was not ready for that ending! Obsidio has a lot of explaining to do.