[ValhallaGH]

Memory!
True 20: Blood and Fists - generic martial arts combat book. It aims for a modern flavor but can be useful in any setting. Be warned, not everyone likes the way it works (though so far I've only heard one complaint) - basically style feats give a small bonus to a skill or two and improve feats that the style emphasizes (trip, grab, defense, etc). There's an extra mechanic included, by way of internal / external styles, but that's simple and cool. A good book in almost any setting, as long as melee combat is supposed to be important.

For a second, you'll need to expand some more on what you've already said.