RIGHT, so I'm kinda all over the place after finishing this, so be prepared for a loooong review as I try to explain how much this book means to me. 
 Natasha believes in science. Fate, to her, doesn't exist, and love is the last thing on her mind given her family is about to be deported back to Jamaica after it was found out they're undocumented immigrants. 
 Daniel has always been the nice, good boy that has done everything his strict Korean parents expect of him, and is on the fast track to pre-med at Yale. What he wants more than anything, though, is to be a poet. Daniel believes in great love, in the Fates, in "meant to be". 
 When these two collide, sparks may not fly-at first- but what follows is a day that explores all the tiny threads that weave every little human in the universe together; how multiverses exist and how every tiny, inconsequential decision we make opens up a new path. It's an exploration of destiny and science, love and chemicals, "meant to be" and unfortunate reality- and it is exactly the book I needed right now. 
 I fell in love with Nicola Yoon's writing last year with Everything, Everything, and so when I received the ARC of this book I thanked all my lucky stars (even Polaris, which apparently is only the fiftieth brightest star. Thank you for that info, Mrs. Yoon!). I decided to go into this book blind. I wanted to be surprised, and not know what to expect. I'm so happy I made that decision. 
 The characters: 
 Natasha and Daniel are, for all intents and purposes, polar opposites. He is the glass half-full to her half-empty. And it works. It really, really works, because the room for the character development that occurred was insane. To see Daniel's hope leak over into Tasha, and her truth and reality blend with him was so. Just. Fulfilling, is the only thing I can think to say. I loved that Tasha, despite her own passion for being notpassionate, was the catalyst for Daniel to realize he had to stop waiting for a sign to be the thing to get him off this path he didn't want to be on; he had to do it himself. And he showed Natasha that hope, love, and dreams are okay. They're part of what makes us human. You don't have to disregard them all in order to ensure stability in life, in order to prevent all the "what ifs" and heartbreak they might cause. Daniel was so beautifully human and to see that in Natasha by the end of the book had my heart in a vise. I rooted for these two until the end. How could I not? 
 The plot: 
 This book takes place over the course of a single day, which is kind of hard to believe considering everything that happens. Was there instalove? Yes. Was it blatantly obvious? Not really. It was definitely more exaggerated on Daniel's part, but then again he is the poet in the story, romanticizing everything (I'm not gonna lie, I kinda loved him for it, but yea, at times he was a bit disillusioned). They were each searching for their own forms of divine intervention, whether they realized it or not, and so they were kind of inevitable. But it took a hell of a lot to get them to that point. With New York city as their backdrop, these two each have their own goals in mind, and along the way make the most interesting detours that definitely kept me on my toes. 
 I really respected the family and racial representation in these books. I am not at all knowledgeable of Jamaican or Korean culture, but knowing that the author herself is Jamaican, and her husband Korean, it's obvious that so much detail and thought went into this book regarding that cultural representation and the little tidbits of history about both of these cultures throughout the book. It was amazing to read about, and a true learning experience. That brings me to my next point: 
 The writing: 
 The intelligence that is displayed in Yoon's writing is so refreshing. I am a sucker for smart romances. The book blends scientific information with philosophy, hard facts with lyrical prose and nuggets of wisdom that made for an unforgettable reading experience. This book taught me more things about chemistry than a full year of the subject in high school did. And it did it in a way that added character, and only further immersed me in the novel and Natasha herself. The writing is just so smart and I love it. 
 The format: 
 Probably my favorite thing about this book. In Yoon's last novel there were illustrations, dictionary entries, one-line book spoilers; in this book there was different POVs, but in a way I've never seen done before. The basic thing to say is that it's told from both Daniel and Natasha's POV, but it also gives excerpts of history and glimpses of future about other characters in their respective voices. Natasha's dad's life story is explained through these little excerpt chapters, and a security guard's life is explored, an attorney and his paralegal, Daniel's parents, a man in a white BMW- I'm probably not making sense but I don't know how to describe this. It was like unlimited points of view, but the ones that weren't Daniel and Natasha's served as backstory and versions of prequel, kind of, and furthered the book's message that every human, even in some minuscule, insignificant way, is connected, which is also shown by the unique illustrations above each character's name at the start of a new chapter, and the cover image itself. It was unreal and insanely clever. 
 What I'm trying to say: 
 This review is already waaay longer than I intended it to be, so I will just finish with: this book is important. It's the book I needed at 17 years old. I devoured it. I love it. SO much. It is witty, hopeful, clever, and filled with so much beauty that my heart hurts. Daniel and Natasha's story is crazy, if a little farfetched, but it gives me hope. Not just about love, but life, taking chances, letting go and chasing what you want, and how maybe there is a hint of reason in the world; maybe little threads are everywhere holding us all together in this crazy, beautiful, sometimes awful experience of life. That sounds cheesy and philosophical probably, and the book explains itself better than I'll ever be able to do. This title hits shelves on November 1st, and I can't recommend it enough.