4.5 stars. I think this book was beautiful. I enjoyed this story tremendously! It was so great and I loved the characters a lot. 
 Baz is definitely my favourite of them all. He was just perfect and I enjoyed his POV so much that I wouldn't have mind the whole story written in his perspective. (That wouldn't have worked but still) 
 I loved Penelope and of course Simon was a great protagonist. The only one I didn't like was Agatha. From the first time I've read about her I couldn't stand her at all. 
 Still I think the story started of a little bit slow but only for a a few chapters. It was a little bit confusing in the beginning because I thought this book belongs to a series and isn't a stand alone book. 
 (Why aren't there more books Rainbow Rowell - I want to read more about Baz and Simon!) 
 And another thing that was irritating at first was that it was so similar to Harry Potter at first! But just in the beginning ! It quickly became its own story. And a perfect one as well :) 
 Really loved this book! I definitely need to read other books of Rainbow Rowell now :)