I have to admit, I'm a little disappointed with this book. 
 Not that it wasn't a great read--because it was. I absolutely devoured it. Bardugo did a superb job leaving you hanging at the end of the chapter, desperate to keep reading. There were a few times when I told myself I'd put the book down after I finished the chapter I was reading... but by the end I just couldn't! I had to keep reading. 
 There was also a fabulous twist with respect to the search for the third amplifier that I did not see coming. It actually floored me. (Its resolution was a little lacklustre, though, but that's only because I like it when the stakes stay high and consequences are sometimes dreadful.) 
 Still. All that said. There was just something missing here. Something about this conclusion that did not meet my expectations. In general, it was the resolution to a number of plot threads that ended up being too convenient. 
 It's not that I didn't like the ending. That I wasn't pleased with how it all turned out. But more that feeling of "we could've had it all". And it just did not deliver. Maybe my expectations were too high. 
 Still, it is absolutely one for the bookshelves. And a series, overall, that I thoroughly enjoyed and would absolutely recommend.