The conclusion to the trilogy. For this book we abandon the single POV and get a series of overlapping and parallel stories. Some of the story continues on from the Biologist and Control at the end of book 2, though we now see some of the action from her viewpoint.
We also have interesting chapters running alongside that deal with the beginning of Area X–before it was even a separate area. Plus we learn about the S&SB (though only indirectly), get more theories about Area X and its relationship to “the normal world”, etc.
It’s a more straightforward book, despite the many viewpoints and multiple timelines. It’s interesting to see the overlap and weirdness, and to find out more. An intriguing conclusion to an interesting trilogy.