Cleo is proven to be immune to loneliness; an introvert at heart, she gets sent on a space mission where she will be in isolation for a long time. When her and her crew (all separated), land on Orbis Alius, they decide its not suitable for life, until that assessment changes unexpectedly in only a matter of days. When one of Cleo's crewmates goes missing, she sets off to find her and finds a dark, thick gas that separates drastically different biospheres. She also notices something is lurking... and following her.
The writing in this book was clear, but it was also twisty. I was questioning whether the narrator was unreliable, whether everything was a delusion, and a lot of the twists came unexpectedly. I also think the author did a good job of describing all the different biospheres. Some of the settings were so outlandish that they were hard to picture at first, but the descriptions were vivid and well done. I thought the pacing was perfect. It didn't drag or rush through events.
I really liked the character development in this book. In the beginning we're introduced to Cleo as the "float girl." She's described as a loner who does drugs called auditives (apparently non-addictive, but they clearly mess her up at points). But as the book goes on, she starts helping Yasmin with her theory, she gives a pep talk to Daniel when he's struggling with isolation, and all-around becomes a team player.
I found this book to be really entertaining. I wanted to know what was going to happen next, in the next biosphere or in general what the heck was happening. I really enjoyed Shakes and his rapping. I thought that was a cool touch, except I will mention that once he was introduced, my brain tried reading every single line in the book as a rhyme.
Overall, I really enjoyed this book! I would recommend this book to anyone who wants a thrilling sci-fi or a book about a space mission gone-wrong.