Sapphire Blue by Kerstin Gier.
This is the second book in the Ruby Red trilogy (called “Liebe geht durch alle Zeiten” or “Love goes through all times” in the original German.) It is more time travel fun, with a light chick lit feel even as our main characters’ lives are in danger. It’s only been a few days since the start of the first book. Gwyneth/Gwendolyn/Gwen is getting more involved with the organization that controls the time travelers, still falling in love with handsome fellow time traveler Gideon and trying to figure out what his feelings are. Her suspicions that something is not quite right with the official story is getting stronger, but she doesn’t seem to be able to convince anyone (including herself) that she’s competent enough to be taken seriously. This last is much more common in chick lit than in fantasy, and I found it quite refreshing to have a heroine whom we know has some talents but who’s mostly considered too ordinary to matter much. In the “something is not right” category, we have young runaway lovers Lucy and Paul, who are sweet when we see them but believed to be bad, versus the very creepy but clearly in charge Count. Gwen also acquires a sidekick in the form of a gargoyle-like creature that no one else can see, Xemerius, and spends time with her best friend trying to figure out what it means that she is supposed to be the Raven. It all started out looking very clear-cut (but still addictive), and I was pleasantly surprised to find that the plot did have some unexpected twists.
All three books in the series and the movie version of Ruby Red are out in Germany, but Emerald Green isn’t due out in the U.S. until September. I really, really wish I could find an ebook version of the German, because then I could read it right now and I’d love to read it in the original anyway. All my searches on this have been unsuccessful, though – if any of my German readers have any tips, I’d love to hear them.