8 books • 5 series
Civil War (The Civil War)
Glacier (Planet Earth, #5)
Air War in Europe (World War II S.)
Partisan and Guerillas (World War II S.)
Partisans and Guerrillas (World War II S.)
Violence and Aggression (Human Behaviour S.)
Home Front U.S.A. (World War II) (World War II S.)
Role of the Brain (Human Behaviour S.)