Subclass skills

hello guys i have one question about sub class skill change , i have done warrior sublass but i want to change this skill for knight class skill, i have already started to do dark avenger but yesterday one of my friend told me that i wont be able to pick book for knight specific skill, and i can only change skills for warrior on this sublass. true? i cant find any updated info about it ><
thanks for any help

For knight class skills you need knight sub.
For warrior skills you need warrior sub.

ATM it is true. You can only get the books for subclass skills of your subs. It is the way it was meant to be. But when they first introduced subskills, they had an event where there was an event cat that you could trade for the level 75 subclass skill of any class that you desired. After the event was over, you couldn't do that anymore.

thanks for reply but i think some of you read me wrongly, what i mean is that i have deleted warrior subclass wich was already on 75 (i took warrior skill from it)and i`m doing knight class now, my question is that when i reach 75 on Dark Avenger I will be able to get knight class book to change my existing warrior skill?(ofcourse i will cancel previous skills)

Thanks

thanks for reply but i think some of you read me wrongly, what i mean is that i have deleted warrior subclass wich was already on 75 (i took warrior skill from it)and i`m doing knight class now, my question is that when i reach 75 on Dark Avenger I will be able to get knight class book to change my existing warrior skill?(ofcourse i will cancel previous skills)

Thanks
No once you take a skill from a sub,say the lvl 65 one, & then you delete the sub & sub something else, you will not get to pick again at 65....you will have to wait till lvl 70.

arme still not 83??? final is almost out!