This book in one word: heartbreaking.
I am not okay, and I maybe shed a few tears. The cover of this book is just beautiful, and it becomes all the more meaningful once that scene happens. I really don't know where the series is going from here, but there's a lot of apprehension moving forward.
First, the Prologue. It's told in Florencia's POV and is largely a meeting of intelligence, various characters discussing their understanding of things from the visit at the end of the last book.
As for the rest of the main book, a mystery crops up fairly early, and things devolve pretty quickly. It also becomes apparent Ehrenfest has been pushed to going on the offensive with certain things that are pretty dark. Really, the events transpiring in this book are things that have been brewing for awhile, and it makes it all the more clear Ahrensbach is a very dangerous place.
There are some really touching moments near the end of this book, and I just... I'm not okay.
The Epilogue is from Ferdinand's POV, and it was nice to see the final moments from his perspective plus the very start of his new life. Also, sidenote, I want to punch Detlinde in the face. Grr, I know it's because of who her mom is, but I don't think there's any saving her at this point.
Now, bonus stories. This being the end of an arc, there's quite a few of them.
The first one is from Sylvester's POV, and it's him coping the few days following the events at the end of this book. There's also some nice reminiscing of him and Ferdinand back when they were younger.
The second is from Justus' POV, going a little bit into his associations with Georgine but largely focusing on him finding ways to gather intel in his new living situation.
The third is from Cornelius' POV, and it covers some of the events that I assume are going to be skipped over between this volume and the next (when it comes to Rozemyne's POV, anyways). In that case, it's a nice bridge.
The fourth is from Mattias' POV, and some new information is learned as the story continues forward. I can't believe such a big moment was put into a bonus story, but I do think it works best told from his viewpoint, he inadvertently a major player.
The fifth is from Wilma's POV, and it covers a difficult transition period that I won't get into because of spoilers. Hartmut is as obsessive as always, though. :P
The sixth story is from Kamil's POV, and I love it. It's easy to forget how much time has passed, and it's nice seeing him at roughly the same age Myne was at the beginning of this series. It's still sad he doesn't know any of the secrets, but this story was pretty touching all the same.
The seventh is from Rihyarda's POV. While all of the other stories have moved forward with time, this one jumps back to earlier in the main book. It brings back some of the heartbreak, but it's a nice bit of closure.
The eighth and final bonus story is from Fran's POV, and, again, it jumps earlier in time. It just... It's a great reflection on how Ferdinand has changed because of his relationship with Rozemyne. However, those ending few lines... I hope Fran one day gains what he desires.
As for the bonus comics, Rozemyne with dog ears and a tail was quite cute. I enjoyed the rest of the comics as well, they playing off of funny moments that happened in this volume.
I love the artwork in this volume. The color illustrations are perfect, and I loved all the other illustrations as well. There were so many important moments, and the art captured them perfectly.
Overall, this is a great end to this arc. I do have to say the name of this arc is a bit misleading, as it felt like it rarely had to do with the Library Committee, but I really enjoyed this volume and this arc overall. This ending volume is super tense and emotional, and a huge change has been made to the status quo. I love that the majority of the bonus stories progressed things forward, and it worked well to see the various events through various viewpoints.
I'm not ready for what comes next, as it kind of scares me, but I'm eager to see where the story goes from here. Some problems have been dealt with, but there are still many mysteries and problems left to explore. Though this book is short outside of all its bonus content, it was quite a way to close out this arc. I could not put this book down.