I wasn't too sure if I would like that book but ended up enjoying it. 
 Kate is quite a strong character and has a lot of determination and courage. She accepts all the turns in her life and fight to keep what belongs to her. She goes through so many emotions in the book that it makes her even more real to the reader. I also really liked Katherine's character. Even though her age and the fact that she can't travel anymore, she spent almost 20 years trying to find a way to fight Saul. 
 On the down side, I read the book on my Kindle and I found a bunch of mistakes (like a page that was there twice and stuff like that) which annoyed me a bit. I believe that having watched Doctor Who made it easier for me to understand the time thing but it still was quite hard to follow at some points. I believe the quote "time is more a big ball of wibbly-wobbly, timey-wimey... stuff" is quite correct in this book! 
 I found the book to be rounding everythin quite well at the end of the book. Even if I know the story continues to fight the Cyrists, I could keep it here as there isn't a major bomb that makes me want to read the next book now! If I get the chance I'll read the second book of this serie.