The Fourteenth Goldfish - by Jennifer L. Holm

It really has nothing to do with goldfish, FYI.  This is actually the story of 11-year-old Ellie, a girl with serious boy problems, but they're not what you'd expect.  As she navigates the new waters of middle school and shifting friendships, Ellie also meets a new boy, Melvin, who seems suspiciously similar to her cranky old grandfather.

As Melvin and Ellie get to know one another, she begins to discover new interests and strengths, and finds the courage to break out of the direction her parents have hoped she would follow.  She makes new friends, has quite an adventure, and while she doesn't save the world, Ellie finds herself.

This is a fun, curious, charming, and imaginative story.  It blurs the lines between friendship story and science fiction, and is a fast and enjoyable book to read.  I would recommend it to anyone who wants to be pushed to think deeply about science and possibility, those who have a sweet spot for cranky old people, and anyone who wants to enjoy a touching coming-of-age story about a brave young girl.