The Purple Invasion
Originally published in Operator #5, issues 26 to 38. A series of 13 interconnected novels in which the Purple Empire conquers the United States. Operator #5 led the insurgency against the Purple Empire.
Series 2
| Secret Service Operator #5, June 1936 | Pulp Magazine | |
| Secret Service Operator #5, February 1937 | Pulp Magazine |
Added by ThomasP64