This was definitely my favourite out of the whole series, I really enjoyed it. 
 It was the most coherent, it had a beginning, a middle, and an end, and everything flowed nicely, but it still kept the whimsical, jumpy tone. It wasn't overly confusing and jumpy, like the last book seemed, but it still held the same tone as the previous three books. I loved the characters and the plot of this was really well thought-out and intricate and whimsy and weird. 
 I didn't really get the whole Blue-tree thing, though? I feel as though it was super random, talked about for two chapters and then never mentioned again? I feel like there could have been more on that. I also would have liked more on Ronan and Adam's relationship in the end, and how that tied in with Orphan Girl? It was almost too open-ended for me, but it still was a nice ending.