Quotes from book
Once

Once is a 2005 children's novel by Australian author Morris Gleitzman. It is about a Jewish boy named Felix who lived in Poland and is on a quest to find his book-keeper parents after he sees Nazis burning the books from a Catholic orphanage in which had stayed at for 3 years and 8 months. He finds a girl, who is unconscious, called Zelda in a burning house with her dead parents—he takes her with him and protects her from confronting her parents' death by telling her stories. Although Once is a work of fiction, Gleitzman was inspired by the story of Janusz Korczak, the events of World War II, and Hitler's attempt to exterminate the Jewish population of Europe.