The Elephant Keepers' Children by Peter Hoeg

Peter and Tilte are trying to track down two notorious criminals: their parents. They are the pastor and the organist, respectively, of the only church on the tiny island of Finø. Known for fabricating cheap miracles to strengthen their congregation's faith, they have been in trouble before. But this time their children suspect they are up to mischief on a far greater scale.

Hardcover, 2012

Goodreads: 3.44