Most of the book seemed like filler honestly. You don't really get any idea of what actually happened until the last 50ish pages of the book and very little of it is built on anything that happens for the first half of the book. There are a few pretty good "bait and switch" moments but the actual reveal is so unsatisfying. The book also has a lot of plot holes. Characters state they were doing something that contradicts with the earlier scenes or don't address something that clearly would have had an effect.