Lily Ebert, a Holocaust survivor and author, died Oct. 9, at her home in London. She was 100. In July 1944, when she was 20 years old, she and most of her family were packed onto a train and sent to the Auschwitz concentration camp where, on arrival, she watched as her mother and two of her siblings were led to a gas chamber. She vowed that if she survived, she would tell the world what had happened to them, and to those who had no one to tell their stories.

She survived, and she spent the rest of her life fulfilling that vow. She spoke publicly about her experience, wrote a memoir, Lily’s Promise, which became a New York Times bestseller, and educated millions of young followers about the horrors of the Holocaust on TikTok, through an account she shared with her great-grandson Dov Forman.