Let me start by saying: I really wanted to like this book. The author writes well, the premise is intriguing, and I'm a sucker for books that spiral in time. That said, either I'm stupid (distinct possibility) or it was unnecessarily complicated.

It started and ended strong, but in the middle, I became impatient with the details - not all were relevant to advance the plot or deepen the characters, and I found myself frustrated trying to keep track of everything - only to realize it didn't really matter in the overall arc of the story. I also think that despite the complexity (or maybe because of it?) the author missed opportunities to tie some of the loose threads back into the story in a way that would've made it even more clever (and more poignant).

Lots of people clearly like it, so maybe I wasn't paying enough attention. My advice: enter with tempered expectations and they may be blown away.