Mixture
Apologies to all the humanists and spiritualists but it's time we moved on.

Having flown through all the genres, it becomes apparent that not only are some problematic in adequately describing what a particular book may contain but also that there are many that are a combination of genres.

Let's start with the superhero who might be said to inhabit three genres: science fiction, fantasy, and crime.

Consider Captain Atom who combines the hard science of the atom bomb with the SF staple of UFO technology producing a combination that can only be fantasy. No one could survive that blast!

It is inevitable that, even if you're a Human Bomb you'll put aside your incendiary concerns and go after the bad guy; whether that guy is a saboteur or a thief. After all, we can think of advantages for diamond hard skin that the patriotic Blue Diamond would have no time for while there was a war on.

For a hero like the Darknight Detective, his focus on beating criminals was set by the tragedy that defined his life. Even in the year that war broke out. It was only later squeamish comics code curtailing of crime comics that sent he and Robin into space. But this was not true to his calling and, as soon as they could, the publishers were only too happy to have him back on the streets.