Breda's Island, by Jessie Ann Foley

Thirteen year-old Breda has been caught one too many times stealing from others.  It's all petty stuff and mostly done for attention, but her mother, an undocumented Irish beautician, is at wit's end.  She decides that the best way to shape her daughter up is to send Breda to Ireland (a country where Breda's never been) to her grandfather (whom she's never met).  Predictably, the homecoming starts off rough but eventually Breda connects with the old man.  In the process, she sorts through her problems and gets her life back on track.  

As an overall story, there's nothing new here.  The rebellious teen and the crotchety old man straightening each other out is the worst form of trope -- a fantasy worth of a Hallmark show.   And the rural Irish setting is full of plenty of stereotypical blarney. But the book is full of surprises.

Breda has never had a father in the picture and returning to her mother's home gives her a chance to track him down.  Doing so dredges up a lot of buried grudges and anger.  It also causes her to stumble over the fact that her grandfather was also born out of wedlock.  And in his days, such children were abandoned to orphanages where they were subject to severe abuse.  His trauma is largely suppressed but played no small part is how he treated Breda's Mom (and thus Breda).  Coming to terms with Breda's feelings about the lack of a father means also dealing with her grandfather's legacy.  The result is a surprisingly complex story with pretty intense themes about family and abandonment, all of which might be a bit intense for middle readers but make for a surprisingly satisfying mature novel.