I feel safe just by holding abook full of know-how to
prevent for various industrial and natural disasters.

ATK +10%, Critical +3.

Refine Level +7:
ATK +40, ASPD +10% (After attack delay -10%).

Refine Level +9:
Increases critical damage by 15%.
Physical attacks have a chance to increase physical damage against all size enemies by 15% for 10 seconds.

Refine Level +11:
Decreases after skill cast delay of all skills by 20%.

[iRO Description]
A book full of information on preparing for various industrial and natural accidents.
Just holding it makes you feel safe.

ATK +10%, CRIT +3.
When refined to +7 or higher, ATK +40, increased ASPD (ASPD +10%)
When refined to +9 or higher, Critical damage +15%, when physically attacking, create a chance to gain additional DMG +15% on enemies of all sizes for 10 sec.
When refined to +11 or higher, Additional Critical damage +15%, After-cast delay -20%.

Class: Book ATK: 200
Weapon Level: 4
Required Level: 170
Job: Star Emperor Only