Crime fiction (Wikipedia)
Crime fiction, detective story, murder mystery, mystery novel, and police novel are terms used to describe narratives that centre on criminal acts and especially on the investigation, either by an amateur or a professional detective, of a crime, often a murder. Most crime drama focuses on criminal investigation and does not feature the courtroom. Suspense and mystery are key elements that are nearly ubiquitous to the genre.Military fiction (Wikipedia)
Military fiction is a genre of fiction, focusing on military activities, such as war, battles, combat, fighting; or military life.Speculative fiction (Wikipedia)
Speculative fiction (also known as the fantastic, and as fantastika in Slavic countries) is an umbrella genre of fiction that encompasses all the subgenres that depart from realism, or strictly imitating everyday reality, instead presenting fantastical, supernatural, futuristic, or other imaginative realms. This catch-all genre includes, but is not limited to, science fiction, fantasy, horror, slipstream, magical realism, superhero fiction, alternate history, utopia and dystopia, fairy tales, steampunk, cyberpunk, weird fiction, and some apocalyptic and post-apocalyptic fiction. The term has been used for works of literature, film, television, drama, video games, radio, and their hybrids.