This short book describes in a vivid way the constant battlegoing on in human history between the good and evil spirits. These spirits or angels have intellects and wills of their own,and direct themselves freely towards good or evil. Besides strugglingwith each other, they particularly fight for the souls of human beings,either to condemn them or to save them. These battles can be seenboth in Sacred Scripture and in key events throughout humanhistory; they will culminate in the final victory of the Lamb orLast Judgement, where the kingdom of Christ and his angels willtriumph forever.