Graceling, first book a fantasy trilogy, shows Katsa as the protagonist. Her world is populated by normal people but also by other, more special ones. They've a gift, something that is reflected in their mismatched eys. Their name is Graceling and their gifts are always different from eachothers. 
 Katsa eyes're one blue and one green, but her gift isn't something she likes. She's able to kill - more a war machine then a normal girl. 
 Graceling is the start of the path that Katsa will start to walk, rebelling against her uncle, Middluns Rand - the king. She's enough of being his own personal assassin, something that has been deprived of basic human rights. 
 Things start to change when Katsa continue to works with the Council and she meet a strange Graceling - silver and gold eyes - named Po. 
 So, I read this novel when I was fifteen. Then I read it again and... no, just no. The concept, the basic idea, isn't bad, okay? But the rest is not something that I would suggest. 
 First of all, I'm not fond at all of Cashore's writing style. She's quite repetitive - or it could be a fault of the italian translation? - but the most annoying thing is how she use some words in a fantasy medieval like world. 
 Why do she use words like "okay" or "privacy"? These words were translated just like that in the italian version and they sounded totally out of context. 
 There also many other questions that I ask myself. Why do peolpe hate Gracelings? Thinking about Katsa, I can understand that. She is a human weapon with a lot of anger issue, so she's quite dangerous. But the others? A Graceling that is excellent when it comes to cooking... I mean, how can you hate him/her? 
 Also... Katsa is shown, multiple times, to be completely able to defeat trained warriors that should protect her uncle from any kind of threats. So, why does she not kill him? During the book she will face her uncle at least one time, and she will be really near him. But she just doesn't. 
 The answer could be: Katsa is sumbmissive and scared towards Rand, but in the book I didn't catch any actual proof of this terror and submission. 
 Also, why Rand never cared of making Katsa loyal to him? He's a king and his best weapon start to roam free all over the other kingdoms... This is not possibile, neither possibile. 
 She could have started a revolution to put Raffin - his cousin and Rand's son - on the throne, since him and Katsa are really close friends. 
 Honestly I wasn't a great fan of the romance, but I loved how Cashore tried to decipe her conviction about women - their freedom and choice to have children or not. 
 Po wasn't really my favorite. He's nice, with hidden secret but good intentions. He's a bit fragile, always hoping to protect his beoved ones. 
 Sometimes he and Kats will fight on various topics and Katsa's acts lead me to ask: has she really won over her own barriers? 
 Katsa is brutal because it's the only way of living thay she learned and because she thinks that it's the only choice she has. She's not quite able to understand people and to releate to them, but some parts of her are completely off. And no one seems to notice or care to speak aloud about that. 
 Katsa is more a borderline character than a normal one, running her anger towards people that fell in love with her, maybe not understing her enougth or fully, but really without evil intents. Either way, she will end up screaming at them like they're demons. 
 So, there are all the great premises for a great books, and maybe I would have loved more the book with an actual end. 
 Did the Council win? Was Rand defeat? What happened to the kingdom of Monsea? 
 In the end, re-reading this book left me wasted and quite delusional.