For Europe: The French Volunteers of the Waffen-SS (Stackpole Military History Series)

Impeccably researched, this book tells the story of the Frenchmen who, motivated by their hatred of Communism, chose to fight for the Third Reich in World War II, first in the regular army and then as part of the Waffen-SS. These unique soldiers participated in bitter combat, primarily against the Soviets, and returned home to an awkward peace.