Bluebird by Sharon Cameron

A historical novel, set in postwar New York City.

In 1946, Eva leaves behind the rubble of Berlin for the streets of New York City, stepping from the fiery aftermath of one war into another, far colder one, where power is more important than principles, and lies are more plentiful than the truth. Eva holds the key to a deadly secret: Project Bluebird -- a horrific experiment of the concentration camps, capable of tipping the balance of world power. Both the Americans and the Soviets want Bluebird, and it is something that neither should ever be allowed to possess.

But Eva hasn't come to America for secrets or power. She hasn't even come for a new life. She has come to America for one thing: justice. And the Nazi that has escaped its net.