Thunder Bay (a.k.a. the history of Henry Melou)

Thunder Bay by William Kent Krueger: For all the folks who really wanted to know more about Henry Melou: this book is for you.  Henry ends up in the hospital and then asks Cork to help him out by tracking down his son.  Yep, his son.  This is a big surprise to Cork, who wants to know the whole story.  And it is a long, sad story full of history, tragedy, love, and murder.  Then it's back to the present where more tragedy and murder and mystery await as Cork does his best to track down the mysterious son to arrange a meeting.  When he finally does, the reunion goes awry, and there is more death.

Good stuff!