Read more reviews at my blog, Words and Tea Bottles. 
 I was told that Days of Blood and Starlight was supposed to be even better than Daughter of Smoke and Bone, and I can definitely believe it. The problem I had with Daughter of Smoke and Bone was that the romance was unrealistic, with no buildup for either Madrigal or Karou. It made me less sympathetic with the characters when things went bad. 
 However, in Days of Blood and Starlight, the focus shifts from the romance that Daughter of Smoke and Bone was so intent on laying out. It's been completely dismantled, in fact, and the focus is put more on world building and the war between seraphim and chimera. It's refreshing. The book is full of twists and turns that keep you guessing. The writing itself has changed; it's not so much like a fairytale in most places. The contents of this book are harsh, full of death and disappointment for the characters. I guess what I'm saying is: this book is brutal, and it's exactly the kind of thing that's needed in fantasy these days, I think. Then again, I think it's needed in every genre: hard truths and characters working hard only to lose what they were so sure they'd get. It's a refreshing change. 
 There are more differences between this and the first book as well, though; it's in multiple points of view. Not first person, but close third. I was somewhat thankful for that, mostly because I've read so many books that have failed to make first person multiple POVs sound any different from each other, and Karou, Akiva, and everyone else that the book follows throughout the chapters are very much different from each other that it'd be a shame if the author had tried it and fell into the same trap. There's even a chapter that follows a guard in the seraphim capitol as he watches one of the emperor's concubines make the walk to his chambers that night. Between that and the civilian chimera you see for much of the book, I feel like the book gives you a good grasp on just how the war affects the common person, not just the soldiers like Akiva and the people working behind the scenes like Karou. 
 As a final note, I'm pretty sure Akiva goes Super Saiyan near the end. I won't give details, but it was epic and it amused me.