Beekeeper's Apprentice 

The first in a series of four Laurie R. King re-designs. The books revive the character of Sherlock Holmes and introduce his new partner, an American named Mary Russell. I illustrated the covers, which were art directed and designed by Henry Sene Yee.
The profiles of the two characters change slightly on each cover to indicate how their relationship evolves. It's on the Picador Web site at: http://www.picadorusa.com/product/product.aspx?isbn=0312427360