 The 1988 Gainax OVA series "Gunbuster" has plot elements similar to Heinlein's novel, depicting humanity arrayed against an alien military.Scholars have identified elements of Heinlein's influence in "Ender's Game", by Orson Scott Card, as well.Hantke, in particular, compares the battle room in "Ender's Game" to Heinlein's prosthetic suits, stating that they both regulate but also enhance human agency.