Final answer:
The book 'Rena's Promise: Two Sisters in Auschwitz' is a first-person narrative by Rena Kornreich, detailing her and her sister's experiences in the Holocaust.
Step-by-step explanation:
Rena's Promise: Two Sisters in Auschwitz is narrated from the first-person point of view of Rena Kornreich, one of the two sisters who were sent to Auschwitz. The memoir provides a detailed and personal account of their harrowing experience during the Holocaust. Rena's narrative offers a poignant and deeply personal perspective on the events that unfolded in one of history's darkest periods, making it a significant contribution to Holocaust literature.