Buff Slot Expansion

Could someone please explain the process of getting your buff slots expanded? What is needed and who do you talk to etc.?

Thanks.

21st buff slot: Talk with Black Marketeer of Mammon and buy the book, run to your master and learn skill
22nd buff slot: kill some higher lvl Raid boss, get the book, and talk to your master again
23rd buff slot: kill Epic boss, and repeat previous steps.

Books in order =
Modern Language Version
Original Language Version
Manuscript

<ul type="square"> lvl52 --&gt; Ancient Book - Divine Inspiration (Modern Language Version);
Black Marketeer of Mammon (he's in every town except after starter villages, sometimes every well hidden)
lvl61 --&gt; Ancient Book - Divine Inspiration (Original Language Version);
any Raid Boss between lvl66 and lvl74
lvl76 --&gt; Ancient Book - Divine Inspiration (Manuscript);
Epic Bosses (Baium, Antharas, ....)
lvl76 --&gt; Ancient Book - Divine Inspiration (???);
Grand Olympiad Manager (Noblesse Gate Passes needed)
as u can see u need for every lvl a specific Book and u also need it for your main and every subclass separatly ;)

Thanks a bunch for the replies.

BTW, what's the Secret Book of Giants for that I see people trying to sell all the time?

Thanks a bunch for the replies.

BTW, what's the Secret Book of Giants for that I see people trying to sell all the time?

That's for enchanting your skills once you are a Noble.

You can enchant skills without being a noble, I believe you just need third class change. I'm not a noble anyway.

That's correct.
And you'll need a secret book of giants for every skill you want to enchant - and you need another if you fail enchanting one skill and want to try again.