Class Skill Book Redeem Voucher

can be exchanged in the Astral Encyclopedia under "Special Rewards" for one of the following items:
Swordmaster Skill Manual
Mage Skill Manual
Gunslinger Skill Manual
Cleric Skill Manual
Paladin Skill Manual
Hunter Skill Manual
Rogue Skill Manual
Berserker Skill Manual
Samurai's Manual
Ninja Class Skill Book
Dragon Puppeteer Class Skill Book
Soul Eater Skill Manual

All items obtained through exchange are non-tradable.