This is a beautiful, beautiful book. 
 Some authors don't really have a tone, when you read the book it's sort of your own voice and pace (which for me is usually a hurtling speed) but the way that this book is written has a steady, quiet pace. The way things are phrased, repeated and just spaced is so very poignantly used. I'm not saying that there is beautifully imagery, it just comes across so well what Mackenzie is feeling. 
 The story and world building is amazing - the Archived has such a unique premise and it was explored and explained wonderfully! Not lacking in detail or imagination there at all. 
 The story follows 16 year old Mackenzie, a Keeper of the Archive. I can't really say much without giving too much away but I would just like to say that this is one of the best YA's I have read. It's not just all action and things happening, although the pace of things happening and events are not at all lacking, but because there are multiple themes explored in this book. This book is also about people, damaged people. About how Mac is a teenager with a secret life and wishes she didn't have secrets - not at all in a whiny teenage way. A main theme in this book is definitely grief - how it can drown you, how different people handle it and the impact it has in people's lives. How to carry on a midst the grief. it is not the main focus of the book, and not at all over bearing. 
 "Mom may be able to power a city, but Dad barely stays lit." 
 It adds a vital element to the story that makes it so special. And with all of that there is a mystery that needs to be solved, a good one at that. This book just had so many facets to it! 
 "He manages a sad smile. "An omission is not the same thing as a lie, Miss Bishop. It's a manipulation." 
 A favourite aspect of mine was how there are pieces of Mac speaking to her grandfather, at random times in the past, who taught her about the Archived and has passed away, and all the lessons he taught her over the years and how she viewed him and the impact he had on her life. It shows us how her youth was shaped, a bit of how she became who she is. 
 "Lying is easy. But it's lonely." 
 "What do you mean?" 
 "When you lie to everyone about everything, what's left? What's true?" 
 "Nothing," I say. 
 "Exactly." 
 I don't have much else to say, except that this book will get you feeling the feels in an absolutely wonderful way while thoroughly entertaining you about a mystery in a bizarre story revolving around a place where every memory is preserved in the forms of people who aren't really people and are kept in what seems to be an eternal slumber.