Combat AbilitiesFollow

I can not seem to find anything about Combat Abilities.
Could someone give me a link to find out everything there is to know about them. What are tomes? Where do i get them? and so on... I just can not seem to find a site that really talks about them and if Allakhazam does, i do not see it on the menu list.

Thank you for all your help...

They used to be, and some still call refer to them as such, Disciplines. So if you search under disciplines you may find what you seek.
The merchants selling tomes for disciplines/combat abilities are found in the tunnel of EC and the library in POK.