Just started #AlienClay by #AdrianTchaikovsky - has started out a lot like #CageOfSouls it is about life in a prison camp. If you like Adrian's tropes, you'll like this one too. Only 400 pages.
https://www.amazon.com/Alien-Clay-Adrian-Tchaikovsky-ebook/dp/B0CL4FVXH9/ref=tmm_kin_swatch_0
I read #CageOfSouls by #AdrianTchaikovsky - if you like his other books, this has a lot of recognizable Adrian tropes. It is too long (600) pages, but also didn't have any content that could have been cut. It is a book about being a prisoner in a jail in a far future society that has been collapsing slowly for a very long time.