"Swimming Under Water" by Halina Zylberman is a memoir with themes and topics that include:
* **World War II survival**: The book tells the five-year saga of a family's survival during World War II using false identity papers 【1】【2】.
* **The Holocaust**: As a Holocaust survivor memoir, the book explores themes of war, death, loss, and antisemitism 【3】.
* **Family and Identity**: The story revolves around family, identity, and their experiences in Poland during World War II 【1】. The author's family assumed non-Jewish identities to hide from the Nazis 【4】.
* **Courage and humanity**: The book is a tribute to the courage of a family and the humanity of those who helped them 【5】.