Really well written, but...odd? The strange science in this book bugged me (and my engineer husband more), and the strange characterization of Mormons (all the Mormon girls she knows grow their hair long and only wear dresses? Now we're Mennonites?!?) in the beginning made me bonkers. I did enjoy the interactions with Sylvia and Seth, but I would have liked more with Julia's father, and it seemed like the story just kind of trailed off into nothingness. I don't need everything wrapped up in a neat bow, but I do like some resolution.