The Book Jumper by Mechthild Glaser

Amy lives with her mother in Germany, but both of them have had a rough couple of months, so they decide to visit Amy's mother's ancestral home on the island of Stormsay in Scotland.  Amy has always been an avid reader, but in Stormsay she learns that she is more than a book reader, she is a book jumper.  She can jump into the book world and impact the stories there.  It has been her clan's mission to protect the book world for centuries, but that world is in danger, and only Amy, with her special family background, can save it from terrible disaster.

This is a decent fantasy for the omnivorous book geek teens of the world.  Amy meets characters from a wide range of literature, from fairy tales to Anna Karenina.  The whole thing is a avid reader's dream come true. Amy is a likeable character and there is a nice little clean romance between her and the Jumper from the rival clan, Will. The plot is not hopelessly predictable and the book concludes nicely, but with room for sequels.  The book was originally written in German, but the translation is excellent.  I don't think the second book is available in English yet, but I might read it when it comes out.  (384 p. 2017, If you have a Provo Library Card, this book is "always available" in Audio from Overdrive.)