I loved Crooked Kingdom probably just as much as I loved Six of Crows, which is impressive given how much I loved Six of Crows. I was extremely impressed at how such a small storyline was stretched over 500 pages, but it never dragged or got boring. Like the first book, I was constantly on edge about what was going to happen and disbelieving that they would ever get out of whatever crazy situation they had landed themselves in- until I realised that it had been part of their plan all along. (view spoiler)[ I mean seriously, the whole auction was just terrifying/amazing. I had no idea that Wylan deliberately got captured or that they were planning to kill/not kill Kuwei. I could barely keep up. (hide spoiler)] The writing was excellent, I loved all the different POVs, and the characterisation and character development was done so well. 
 The characters are probably one of the best parts of this series, and they were all so badass and precious and perfect. Inej and Jesper continued to be my favourites, but I'm so in love with all the others too (view spoiler)[ WHY DID MATTHIAS HAVE TO DIE I WANTED HIM AND NINA TO LIVE HAPPILY EVER AFTER (hide spoiler)]. The romance was done subtlety and amazingly, (view spoiler)[ I'm actually really glad that Kaz and Inej didn't end up together properly, although I shipped them hard; their ending just seemed so natural for them and any more romance would've felt out of character. Matthias and Nina were CUTE and I loved all their scenes together, and Jesper and Wylan were just perfect. I internally combusted so many times because of them two (and the scene where Jesper accidentally kisses Kuwei was so funny) (hide spoiler)] but for me the best part were the friendships. I especially loved the angsty brotherly relationship between Kaz and Jesper and I'm so here for the strong female relationship between Inej and Nina. I have a new ultimate BrOTP and it's Inej and Jesper; their sibling/bff bond gives me life (view spoiler)[ the entire 'This action will have no echo' scene especially pulled at my heart (hide spoiler)]. 
 Everything was left in a place that I'm not too upset to leave, although more books about these amazing characters would be extremely welcome. This duology is now one of my all time favourites- if you haven't read it (although I'm pretty sure most people have) you really need to!