* The Long Ships (1941), a historical novel considered his most famous work.
* The Red Orm (1949), another historical novel set in the Viking Age.
* The Road to the Sun (1950), a historical novel about the Crusades.
* The Vikings (1960), a popular non-fiction book about the Vikings.
* The Silver Viking (1961), a historical novel about the Viking Age.
* The White Viking (1962), a historical novel about the Viking Age.
* The Black Viking (1963), a historical novel about the Viking Age.
He also wrote several children's books, such as:
* The Magic Ring (1943)
* The Secret of the Old Clock (1944)
* The Mystery of the Missing Treasure (1945)
* The Adventure of the Flying Carpet (1946)
Bengtsson was known for his vivid descriptions, historical accuracy, and exciting plots, making him a popular author for both children and adults.