The Oppenheim Omnibus: Clowns and Criminals 1931: Boston, Little Brown 1931: New York, Blue Ribbon 1931: Toronto, McClelland & Stewart |
Shudders and Thrills: The Second Oppenheim
Omnibus 1932 (July): Boston, Little Brown 1932: New York, Blue Ribbon |
The Secret Service Omnibus 1932 (September): London, Hodder and Stoughton |
Spies
and Intrigues: The Oppenheim Secret Service Omnibus
1936 (October): Boston, Little Brown 1936: New York, Halcyon House |
The Oppenheim Secret Service Omnibus Number One
1946 (May): Boston, Little Brown |