Bloody Foundations: A Grace and Poppy Adventure by Grady J. Gratt

Emma is a golem, an unstopable monster made of clay. For an extra kick the fiend that made her used clay created with the ashes taken from the ovens of Dachau. Emma is set on a “holy” mission, to reclaim artifacts stolen from the victims of the Holocaust camps. Unfortunately she does this by killing everyone and anyone in her way, regarless of innocence, and in the most brutal ways possible.