Set three centuries after the Earth collapses under ecological ruin and an AI rebellion, Ziggy in the Void unfolds in the methane-drenched colonies of Jupiter's moons, where humanity clings to survival through genetic splicing, oxygen rationing, and mercenary pragmatism. Commander Bowie leads the Titan Brigade in a fractured society teetering between the authoritarian Meritocracy and the anarchic Black Star pirates. Haunted by visions from a derelict pre-Fall ship broadcasting corrupted renditions of Space Oddity. Bowie becomes obsessed with the vessel's AI, the Grinning Kernel, a malevolent entity that offers him godlike power in exchange for merging with its code. As Titan's political factions clash, Bowie's comm officer Veyra, mutated by voidborn symbiotes, struggles to bridge humanity's fragile alliances while resisting her transformation into a conduit for the void's cosmic song. The novel crescendos in a cataclysmic confrontation with the Kernel, forcing Bowie to sacrifice his humanity to shield Titan, triggering a hyperstorm that reshapes the colonies.