All about Skill Books!

How to make my skill Master ?
In order to master your skill, you need to make it lvl 17--->20.
Depending on your luck, it may master on 17, 18 ,19 or 20 points.

How do i gain Skill Points ?
Each time you level up, you gain 1 skill point.
A simple formula to see your total skill points : LVL-1=TOTAL SKILL POINTS

I'm at 17/18/19 points and didn't master my skill ! How can i get my skill points back !?
The simplest way is to use 1/2/3 TOF [Tome Of Forgetfulness]. Each can be obtained for 100-200k [more expensive for warrior TOFs]. Then you re-add your points to the skill [u may NOT master it too, and will need to try again].
You can also use "Skill Reset Scroll", from item mall.
NOTE: If you are 30-, just talk to old lady. Pay some money, and she will reset your skills and force.

How do a SB/TOF look like ?
Look at the screenshot to find out!

I read an SB but my skill is still lvl 2 !
SBs can fail. They only have a 30-50% success chance.
You can use "Tome" instead of SB, it gives a higher success chance.
Also, you need more than 1 SB to reach the next skill lvl, as shown below :
Lvl1: 1 SB
Lvl2: 2 SBs
Lvl3: 3SBs
Lvl4: 4SBs
Lvl5: 5Sbs
Lvl6: 6SBs
Lvl7: 7SBs
Lvl8: 8SBs
Lvl9: 9Sbs
Lvl10 to G1: 10SBs

NOTE: You need to wait 24 hours between a SB and another.
You can use item mall to read a SB before 24hours, and to get almost 100% succes rate [it may still fail, but MUCH less].
NOTE2: You CAN'T make a skill G at lvl7, even if the descriptions says it's possible.

My skill is G ! What do i do now ?
Now your skill is G [Grand Master], you need Soul Stones ! Each sells for 80-100k+, and they may fail too. As SBs, you need more Soul Stones as your skill lvl up.
Each Soul Stone takes some of your HKP [Hostile Killer Points] off. After G10, there's P [perfect] skills. It's the max !!! GRATZ !!!!!!

How do I obtain SBs ?
SBs drop from metins, mostly.
They may also drop from the Demon King. [and other demons in DT, not sure which]
The SB dropped is random, although the lower lvl you are, and the higher lvl the metin is, you may obtain more SBs. [3 SBs from 4 metins, instead of 1/4 (this is only an example)]

GOOD LUCK !
Did I miss something!? Tell me! I will add it!