This book was weird, great but weird. If someone had told me when i finished the first book that this is where the series was headed i would have been deeply confused. The seeds are there if you look for them right from the start which is very impressive and while i figured something like this would happen the exact series of events and those leading up to it were still a wild ride. The latter half of the book was a tense rollercoster full of twists and turns and sudden drops. I spent the last few chapters pausing every few pages to distract myself so i could get thought it. The diary entries in the first book and the comments from the thunderhead in the second have been replaced with all manner of things, key among them are the thunderheads attempts at making a new version of itself for a reason that doesn't come quite clear until the end. I loved these little snippets and the insights they gave into the thunderhead as a character. With this book Thunderhead becomes one of my favourite AI characters and my favourite character in this book, it is so much more fun to read about a genuinely caring and intelligent AI than a violent one. Some of the chapters were more experimental in format, Requiem in Ten Parts bouncing between the POV of the Tonist and Goddard as it went through the so named 10 parts was fascinating to read though i wish i had a physical copy as phone formatting did mess it up a little.
Overall I 100% recommend this series to fans of sci-fi and the dystopia genre and cannot wait to read Gleanings, the side story.