Robert B. Parker's Old Black Magic

The heist was legendary, still talked about twenty years after the priceless paintings disappeared from one of Boston's premier art museums. Most thought the art was lost forever, buried deep, sold off overseas, or, worse, destroyed as incriminating evidence. But when paint chips from the most valuable piece stolen, Gentlemen in Black by a Spanish master, arrives at the desk of a Boston journalist, the museum finds hope and enlists Spenser's help.