I liked this book, but it is obviously the first of a trilogy. About 2/3 of the book are spent getting to the main plot, which I suppose is acceptable for a book starting a series, but it's just really noticeable. 
 I did like Gwen and the fact that, while she didn't want to be the time traveler, she didn't collapse in a pile of "woe is me" when she ends up in that position. Gideon was pretty bland, and the romance had no real development. My favorite character in fact was Gwen's best friend. It's great how she's incredibly supportive of Gwen, doing the research that Gwen doesn't have time for, even if their research tends towards movies. 
 The plot was fine, I just found it to take a long time to get to anything we aren't told about on the back cover blurb. 
 So, it was ok. I probably will check out the second book, to see if the plot really gets moving, and if that one is ok or better, I'll read the third as well.