More like 4.5/5, maybe even 4,25 but only because the ending... (view spoiler)[ I wanted Alina to end up with Nikolai and for the Darkling to show up more and get to know him even more (hide spoiler)]. 
 This series reminds of the Shatter Me series because both main characters had incredible character development, as in they both became leaders in their own right. As well, each book in the trilogy was better than the last definitely. 
 And here come all the comparisons... 
 I loved Nikolai like I loved Kenji and more. 
 I loved Aleksander like I loved Warner. 
 And one thing that stood out was that Mal had developed into a character so endearing considering how annoyed I was with him since the beginning. Unlike Adam, he redeemed himself. 
 Overall, I put this series high on my favourites list also because I just loved the world it took place in. I can't wait for Six of Crows now!