The Black Angel (Charlie Parker #5) by John Connolly

When a young woman disappears from the streets of New York City, ties of friendship and blood inevitably draw ingenious, tortured detective Charlie Parker into the search. Soon he discovers links to a church of bones in Eastern Europe, a 1944 slaughter at a French monastery, and to the myth of an object known as the Black Angel -- considered by evil men to be beyond priceless.

But the Black Angel is not a legend. It is real. It lives. It dreams. And the mystery of its existence may contain the secret of Parker's own origins.