Those conversations, and her detailed, painful, heartbreaking — and, later, meticulously fact-checked — memories of surviving the Holocaust , are the basis of “ Lily ’s Promise ,” which debuted at No. 2 on the paperback nonfiction list. The book follows Ebert from her hometown in Hungary to Auschwitz (she fiercely protected two younger sisters after their mother and two other siblings were killed) and then to Switzerland and Israel, where she rebuilt her life after the war. “ Rebuilt ” doesn’t adequately encompass the enormity of starting all over again as a young adult in an unfamiliar place with...