I didn't have many expectations for this book because I started reading Oliver's other series (even though everyone loves it!) and it definitely wasn't one of those books I knew would be on my favorites list for the rest of my life, much less a week. 
 BUT THIS BOOK. THIS. BOOK. IS. BRILLIANT. 
 The beginning threw me a little with some of the petty high school drama, but by the end of the first chapter I was so deeply sucked in I HAD to finish the book...and I literally went to a 24 hour McDonalds to read and have endless coffee supply to do so. 
 I don't know exactly what it is about this book that hooks you so hard and pull you so wretchedly to the surface, but it does. As you learn about each character and their flaws and backgrounds you develop an overwhelming need to just know what happens to them. You see Sam just 1 day later and think, I have to know what happens to this girl. 
 I am a serious fan of character development and growth and this book was exactly that. Sam is not only a completely different and more enlightened person 7 days later, but each day she challenges the world around her to see life through a new perspective and to live it to the fullest. 
 The only thing that really upset me in this book was that (view spoiler)[ in the end, you knew that all the progress and thought Sam had put into those 7 days still left her whole life behind exactly how it had been in day 1. All the characters that grew with her were still going to be back there without her. You saw her potential but in the end it was all "What If?" and you never find out if they're okay. Which, on the summary it literally states "WHAT IF?" like 3 times but hey that wasn't really enough mental preparedness if you ask me (hide spoiler)] 
 I highly recommend this book! It's amazing! I wish I could have read it in high school when I would have related to it more.