Tree of Strangers (2020) is a memoir by New Zealand writer and film producer, Barbara Sumner.

Sumner was adopted as a 10-day old baby. She begins the search for her family of origin when her eldest child is born and she finally sees someone who physically resembles her.

For Sumner, closed adoption is “government level gaslighting” because an adopted person – by dint of a new birth certificate – is (or was before laws changed) legally regarded as born to their adopting parents.