"Mortar Gunner on the Eastern Front: The Memoir of Dr Hans Rehfeldt" is a non-fiction textbook authored by Hans Heinz Rehfeldt, providing a detailed account of his experiences as a mortar gunner on the Eastern Front during World War II. Published by Pen & Sword Books in 2019, the hardcover book offers 352 pages of insight into the military history of the era, with illustrations included. The narrative, aimed at an adult audience, covers topics related to the Russian and former Soviet Union campaigns, making it a valuable addition to the genre of history and military studies.