HOLY GUACAMOLE. 
 This book was seriously so beautiful and so amazing, for so many different reasons. 
 1) The characters. These were definitely my favourite part of the book, and were pretty much spot on. They were just so realistic, they had flaws and weren't perfect, and the diversity throughout them of sexualities and race and body image was just amazing. It was so refreshing to see such a diverse range of characters in a YA book, and I loved feeling like I related to more than one of the characters. I did feel like I definitely related to Frances though, a study machine with a super nerdy alter-ego. Her relationship with Aled was so good and pure, but they did fall out and have arguments like a normal friendship would. I loved that the two main characters weren't automatically love interests because they were a boy and a girl, and I love that Frances didn't end up with anyone just for the sake of it. I also loved the relationship between Daniel and Aled, and how complex and just...realistic it was. Also, Frances' mum! I loved that there was actually a good, supporting parental role model in this book, as I feel like every YA book's main characters have like awful parents. 
 2) The plot. The whole Universe City thing was seriously a great idea in itself (I would totally listen to that podcast, lets be real), but to see it integrated in such a thought out world was magical. The language used in the short excerpts was really beautiful at times, and I had to actually stop reading and think about some of the sentences Alice Oseman had put together because they were that impactful. The only part of the plot I wasn't a huge fan of was the situation with Aled's mum. I feel like at times it was a little too over the top and I struggled to find it realistic, whether it wasn't written quite right or whether it just didn't fit in with the story I'm not sure. I liked the fact that Aled's mum wasn't supportive and was a negative impact on him throughout the book, but I'm not sure if everything she did was relevant and realistic, unfortunately. It definitely didn't take away from the brilliance of the book, though. 
 3) The writing. As I've mentioned before, the writing during the Universe City podcasts was magical and whimsical and beautiful, something I thoroughly enjoyed. I really want to read the whole thing consecutively, (I need to read like a spin off series solely about the podcasts). The writing throughout the rest of the book was also really brilliant. It wasn't a super magical whimsical prose with loads of inspirational quotes, but it was relatable, funny, quirky and again, realistic. It was told from Frances' perspective, which I loved, and all the inside jokes she made about Parks and Rec or fangirling about different things was so cute and hilarious. 
 So, all in all, I loved this book. I'd definitely recommend it to anyone. It features asexuality, bisexuality, the struggles of further education and deciding what you want to do with your life, friendships, relationships, and a whole lot more. It would be especially great for anyone who's currently going through sixth form, as I feel like it sends off a great message. It was easily a 5/5 star book for me!