I'm no expert at categorization, but I am supposedly writing in the thriller genre, and that's what I read, and it's a very broad field. Any story in which the main question is "What happens next?" (as opposed to a mystery's "Who done it?") might be included, with the emphasis on suspense, of course.

The adventure I read a bit and it's usually a thriller that takes place outside and involves a quest of some kind, if I understand correctly. Think Treasure Island. A more contemporary example would be most of Clive Cussler's stuff. The most recent adventure I've personally read was Douglas Preston's "The Codex," in which three brothers chase after their (supposedly) deceased father's treasures hidden in a jungle in South America. They face up to deadly piranha and native tribes shooting poison darts, etc. You get the idea.

Action novels I'm not familiar with. Are you sure such a genre exists? I'm thinking Tom Clancy here, although in America his books are called "technothrillers"; in fact, he's often credited for inventing the genre.

Hope this helps...

Well- sort of - I write action fantasy thrillers with a touch of crime now and then :omg:
But if yours is an action thriller - is it an action thriller fantasy, as it is a parallel or speculative reality? This is my problem YWO doesn't have a box for that - lol! This labelling thing is such a bugbear!
JR

Stop the sketch - it's too silly

In film adventure is a genre all on its own and the main elements are that it should take place in an exotic setting and there should be a quest of some sort. The search for a treasure, a lost city or something like that. So indiana jones and the Mummy and Pirates and Romancing the Stone all fall into the Adventure category. As someone mentioned here Treasure Island and allot of the Jules Verne Books will fall into that category.
Action is something that happens on the street, in a city or something like it. Movie wise well all the bruce willis fillms as an example.
A thriller has to do with heightened excitement and in films its usually linked to terror, horror or mystery. Suspense is the name of the game in thrillers. Thrillers can work two ways: As an action thriller it will emphasize intense, physical action over the character's psyche. Psychological thrillers tend to reverse this formula to a certain degree, emphasizing the characters just as much, if not more so, than the plot.
Alfred Hitchcock has been known as the father of thriller.

And there´s all sorts of sub genres or blender genres ( mixed) that are out there today so maybe your story will be a hybrid of some sort and that´s a good thing. Don´t worry too much about it.
Hope this helped.