The beginning of this book showed a lot of promise and I was pretty interested in where it was going for the first quarter of it. Then the story just got very YA and repetitive for me. Of course it's a time traveling book so things are going to repeat themselves but they just stopped being interesting for me.
The pros of this book are that it's very diverse, which is always refreshing. The idea of time travel in a YA book is always interesting, if it can be pulled off. The story had enough pull for me to want to read if Jack would be able to get and save Kate in the end. Certain parts of the story were definitely more interesting than others.
The cons are that Kate is in that YA quirky sick girl category. She just accepts some of the things Jack does and Jack isn't exactly the strongest character. It made me feel like I was reading a sci-fi version of The Fault in Our Stars because he's trying to save the sick girl. This book could have been much better in terms of plot and characters. As the story gets repeated, the characters feel like they're a little more hollow than the previous version. The pacing is poor because it's slow at some points and then feels very rushed the further you get. The most frustrating thing for me is that the reason for the time travel is never scientifically explained nor does Jack seem to want to figure out why or how he's doing it. It just feels lazy to me. It's like the author thought 'Hey. I want to write a book about time travel but I know nothing about it so I'll make it as vague as possible'. I had high hopes for this book and in the end, I found myself disappointed and only thinking it was okay.