2010 marks the metamorphosis of Cadillac Sky from a critically-acclaimed bluegrass band to a band without boundaries. Already praised as "original", "innovative" and "fearless", "Letters in the Deep" has Cadillac Sky moving further into new territory. With Dan Auerbach of the Black Keys at the producer's helm, this album corroborates Cadillac Sky's bluegrass roots, while at the same time departing into the great beyond, schlepping suitcases full of classical influences, rock and pop, on the way to expanding musical frontiers.