2,25 stars 
 At the beginning I was so enthusiastic about the story! A mysterious girl obliged to wear permanently a veil, who's an amazing fighter and will become sooner or later queen. A funny, sincere and kind prince from another reing. A creative and intresting geography. I was eager to know how everything would develop. I enjoyed a lot the descriptions of the fights and the opposite behaviour of Olina and Kedrik, that resulted really funny sometimes. 
 Unfortunately, with just a single event at one third of the book, my opinion started changing in worse. Firstly, weeks pass without even realizing it, so just a few events happen in a long time span. 
 Secondly, I couldn't understand the behaviour of many characters. How can you be so friendly to an hostage even though she's not the culprit for what happened? 
 I also agree with whom says that the plot slows down in the middle, and more frivolous event take place instead of the real action. Olina seems to lost her purpose at a certain point, even if on the other hand she discovers a deep secret about herself which will change all her believes. 
 Finally, the ending is not really satisfying, as there isn't a proper resolution. No new tracks, no culprits, no catches. I'm really sorry, because when I started reading I thought I'd enjoy it much more.