4.5 
 THIS BOOK! 
 I first picked up Carry On, admittedly, because of the hype all over book community, and I had very high expectations going into it. 
 The first chapter, maybe because my expectations were a little TOO high, felt like a bit of a letdown. I began to see it as one of those holiday books were you just cruise through and not really pay a whole lot of attention. 
 But then, I don't know what happened! I just found myself turning more and more pages and the story just completely sucked me in! I got completely wrapped up in what was happening and I loved the relationships between the characters in the book. 
 One thing that stood out for me was how well-developed the characters were. There wasn't one of those flat, secondary character that we just come to expect when reading a novel of this size (and a fantasy novel, too). For example, I loved Agatha's character. Though she could have easily been written in a very negative light (after what happens between her and Simon, no spoilers), she had a reason for everything, and those chapters from her POV completely fleshed out her character, and, as I've said, it would have been extremely easy just to paint her as "the other love interest that no one's rooting for". The fact that she wasn't makes me admire Rainbow Rowell even more and enjoy this book even more! 
 Aside from characters, the plot was engaging and enjoyable. The twist wasn't a complete surprise but that didn't take away the fun of reading it, because it was so well written. 
 The spells kind of irritated me for the most part, but I could looks past that. The Kit Kat one did make me laugh out loud while waiting for a bus, which garnered some strange looks. 
 Overall, I think a 4.5 is fair and it's very deserving. It's definitely closer to 5 than 4, so maybe a 4.6? Anyway, a highly enjoyable and fast read despite the size, and I would definitely recommend.