"THAT Day Alone" is a book written by Pierre Van Paassen, a Dutch-American journalist and author. Published in 1941, the book is a memoir that recounts Van Paassen's experiences during World War II.

The book primarily focuses on a significant event that occurred on May 10, 1940, which Van Paassen refers to as "That Day Alone." On this day, the German army invaded the Netherlands, marking the beginning of the country's occupation during the war. Van Paassen was present in Rotterdam, one of the major cities targeted by the Germans, and witnessed the devastating bombing and destruction firsthand.

Van Paassen's narrative provides a detailed account of the chaos, fear, and confusion that engulfed the city during the invasion. He describes the relentless bombings, the desperate attempts of the Dutch people to seek shelter, and the subsequent collapse of Rotterdam. The author also shares his personal experiences, including his own escape from the city and his journey to safety.

Beyond the events of "That Day Alone," the book delves into Van Paassen's broader reflections on the war and its impact on Europe. He offers insights into the political climate, the rise of fascism, and the subsequent struggles faced by the Dutch people under German occupation.

Moreover, Van Paassen's memoir explores themes of resilience, survival, and the human spirit in the face of adversity. He highlights the bravery and determination of the Dutch resistance fighters and the sacrifices made by individuals to protect their loved ones and their country.

Overall, "THAT Day Alone" provides a gripping and personal account of the horrors of war and the resilience of the human spirit. Van Paassen's firsthand experiences and powerful storytelling make it a compelling read for those interested in World War II history and personal narratives of survival.