Rating: 4/5 
 ***Minor spoilers*** 
 Gwyneth belongs to a family which contains the time travelling gene. Several members of her family have had this gene, and right now, it is believed that her cousin, Charlotte, has it. It was predicted that the child born on a certain date would have the time travel gene, and Charlotte was born on that day, with Gwen born one day after. Charlotte had been studying for this her whole life and is waiting for her first journey back in time. However, when Gwen is on her way to the grocery store, and somehow finds herself in a past version of the street she's on, even though Charlotte is supposed to have the gene, not her. It seems that Gwen really was born on that day - not the day after. 
 I never really read books that contain time travel. I think the last one I read was Tempest which I barely even remember. I'm glad that I started off with this one, because I really enjoyed it. I didn't go in expecting much because I didn't think time travel could've possibly been written this well. While it didn't all make sense to me (which I expected) I was able to love it anyway. 
 I loved the writing in this book. Even when it seemed like nothing was going on at the moment, I still wanted to keep reading. Usually when the plot of a book slows down, I find myself counting down the seconds (or pages) until something interesting happens again. I wasn't doing that in this book - I wanted to learn more about Gwen's personal life and to get to know her better as a character. I felt that she was a strong and believable protagonist, and she didn't take crap from Gideon, another time traveller only a few years older than her. 
 I think my favourite parts about this book were the historical portions and the characters. The history seemed believable and enjoyable, and I wish there was more time travelling than what I got to experience in this one. I thought the characters were well developed and I liked most of them. My least favourite was Charlotte, who when she thought she had the gene, was completely full of herself, and then when she learned she did not, acted like it was Gwen's fault and that Gwen was too much of a child to handle it. And they were born on the same day! 
 Overall, I enjoyed this more than I expected to and it may be my favourite read of the month so far. I didn't expect to find time travel so likeable. I thought the characters were well-developed and the logic behind the time travel was quite interesting. I'd like to read the next book at some point!