Almost all of Aaron Elkins' books are on my shelves, mostly mysteries featuring forensic anthropologist Gideon Oliver, the so-called Skeleton Detective. It's a terrific series of books and, of course, I've read them all and recommend them highly. Elkins has a second series featuring Chris Norgren, an art historian/museum curator as hero - books I like very much - but unfortunately he stopped writing them years ago. That series consists of only a few books. But they are well worth looking for.
LOOT, is a stand-alone - much as I wish it were otherwise - published in 1999, it is my favorite of all of Aaron Elkins' considerable body of work. It's an art-related mystery/thriller but the hero is Ben Revere, an ex-curator who stumbles upon an incredible find: a lost Velazquez painting in a junk-filled Boston pawnshop. When murder enters the picture, Ben's quiet life is turned upside down as he decides to get at the truth behind the mystery and the sudden reappearance of a masterpiece. His search will take him to Europe and into the darker, murkier corners of the art world as he, ill-equipped for mayhem - but reluctantly dealing with it as best he can -searches for the illusive answers. All the while he is being stalked by bad guys who may or may not be the zealous fringes of some left-over Nazi strain.