On most of the reviews here, everyone's talking about how this book deals an acceptable form of insta-love or at least makes it seem realistic in a certain kind of way. 
 I don't think this story really is about instant love. It's more about the promise of love. 
 ... 
 Natasha is facing a crisis. In twelve hours her family is being deported from the country she's lived in for ten years back to Jamaica due to her father's reckless mistake. She's cynical and realistic but looking for one more chance when she's referred to Attorney Fitzgerald to challenge her deportation. 
 ... 
 Daniel is a hopeless romantic poet suffocated under the expectations of his (good intention-ed) parents and the shadow of his asshole brother. He's got an interview with a Yale Alumni which he's reluctant about since he's not sure he wants to be a doctor. 
 The two teens meet due to nearly foreseen coincidences and everything changes. 
 ... 
 I liked how their dynamic worked with Natasha understandably hesitant and Daniel determined to prove their meeting holds meaning. The fragile mesh of fate and destiny, with all the side characters they encountered and all their histories. That's what I believe the main theme of this book was. Whether or not we really do affect those around us or who we've never even met. What a single second or moment could cause as shown with the lawyer, BMW etc. 
 It also dealt with issues like racism, identity, suicide, loneliness, and a lot more. Nothing is truly destined to happen and yet it is. 
 Nicola Yoon does a good job of challenging that. This isn't a story of two people were destined to be together. It's a story of the promise of something that could be, something waiting to happen or not. It was a question of many people take that chance or if they take another way. 
 I loved the title so much and found the meaning in it right away. 
 "Stars are important," 
 "Sure, but why not more poems about the sun? The sun is also a star, and it's our most important one. That alone should be worth a poem or two." 
 We always find stars fascinating because they're bright and beautiful and the symbol for everything linked with fate. But the author showed us that the sun too, is also a star. Lots of things worthy of fate and magic and mystery are also found under the sun. 
 I totally did not cry after this book.