Two books in single novel.
First two parts are about survival and third part takes place in 5000 years in future. First two parts are mind blowing truely epic but third part is just average. In third part story builds slowly and then suddenly rushed to end.
Science and world-building amazing. Author have explained science behind everything. There is too much scientific details which I liked but some people will not like. It’s hard to imagine while reading third part because there are lots of new scientific terms. Also character development and storytelling isn’t good in third part.
Overall it’s nice read. People who likes interstellar type movies or science-fiction novels or geeks should definitely read it.