This slim book, gracefully written and elegantly translated by Maureen Freely, bears a heavy history.
Cetin, a human-rights lawyer in Turkey, grew up believing grandmother Seher to be a Muslim Turk like her other relatives.
Much later she discovered the truth about an Armenian girl called Heranus, plucked from the massacres and death-marches of 1915 by a gendarme and brought up in his family.
Millions of Turks have such ancestors. Their stories, with this as a luminous example, now help the historic push for reconciliation.