Published Mar 1961 by DC.
Cover art by Murphy Anderson. The Slave Ship of Space!, script by Gardner Fox, pencils by Mike Sekowsky, inks by Bernard Sachs; Kanjar Ro forces the Justice League to help him defeat his enemies by freezing the people of Earth motionless. Only the combined voices of his enemies--Kromm, Hyathis, and Sayyar--saying "Kanjar Ro" can release them. 36 pgs. $0.10. Cover price $0.10.