1. The last heroes - GRIFFIN, W. E. B.

2. The secret warriors - GRIFFIN, W. E. B.

3. The soldier spies - GRIFFIN, W. E. B.

4. The fighting agents - GRIFFIN, W. E. B.

5. The saboteurs - GRIFFIN, W. E. B.; BUTTERWORTH, WILLIAM E., IV

6. The double agents - GRIFFIN, W. E. B.; BUTTERWORTH, WILLIAM E., IV

7. The spymasters - GRIFFIN, W. E. B.; BUTTERWORTH, WILLIAM E., IV

8. The devil's weapons - GRIFFIN, W. E. B.; KIRSANOW, PETER