Speculative fiction is a broad umbrella category of narrative fiction referring to any fiction story that includes elements, settings and characters whose features are created out of imagination and speculation rather than based on attested reality and everyday life. That encompasses the genres of science fiction, fantasy, science fantasy, horror, alternative history, and magic realism.
Derek Kuroda discovered alien artifacts that are sources of immense
power. He joins forces with Sieglinds Kornfeld-Taggart to use this
newfound power to launch dozens of asteroid worlds to freedom but
others are intent on stopping them.