"G.I. Joe (Fictitious character) Juvenile fiction." . . "G.I. Joe (Fictitious character) Fiction." . . . "Juvenile works"@en . . "Fiction"@en . "It is a free country"@en . "COBRA commander has taken Duke and Beachhead prisoner in a COBRA hideout deep in an abandoned mine. Will Duke be able to escape before COBRA Commander and R. Mindbender release their killer robots designed to look and act like the two G.I. Joe teammates?"@en . . "G.I. Joe vs. Cobra. It's a free country"@en . "Investigating an abandoned gold mine for a hidden COBRA laboratory, Duke and Beachhead are captured by COBRA Commander and Dr. Mindbender, who are planning to raid a G.I. Joe team armory."@en . . . . . . . "G.I. Joe vs. Cobra"@en . "It's a free country"@en . . . . . . "It's a free country"@en . . . . . . . . . "Adventure fiction." . .