More of a 4.5 Rating. 
 Wow. I already thought this is going to be good because I love sci-fi and girl power books but this was such an amazing first part of a book. 
 The writing is really nice and I didn't even recognise if Sasha or Lindsay wrote it what I highly enjoyed because I think this is quite hard to achieve. Both of them need to have different writing styles and making it seem as organic as those two did is clearly a struggle but they did it extraordinarily well! 
 Even though it kind of reminded me slightly of Throne of Glass I don't mind. If you read a big amount of stories they all have similarities in one or another way. 
 Zenith is about the "bloody Baroness" Andi and her pirate girl crew of the Marauder spaceship. We also get to know a few other characters in the first part like her ex Dex and Govenor Cyprian. I really enjoy Dex character even though his full name is Dextro and it always makes me smile uncontrollably because of Dextro Energy. Anyway, the characters are nice and I feel invested in Andi and the rest because Lindsay and Sasha already build this past we don't know a lot about and I'm excited to find out how they came to be to the point they are now. 
 All in all, the part was short but very satisfying and I'm thrilled to read the next parts. It ended in a way that you already are invested in the story and that is something I always look forward to. 
 Great job Sasha and Lindsay. As a subscriber and fellow booktuber I am very proud of you. Lindsay and you did an amazing job writing Zenith together.