The catalog itself is not particularly refined, but judging by the revision date marked on the cover, it seems to be updated quite frequently.
Opening the book, there is no preface as commonly seen in past life, just a straightforward listing of text representing the categories of combat skills.
"Combat Skill Catalog (Adventurer Association River Valley Town Branch)"
1. Warrior ... (1-13)
2. Ranger ... (13-21)
3. Barbarian ... (22-32)
4. Mechanical Master ... (32—40)
...
12. Miscellaneous ... (132-197)
...
"Wow, just the catalog alone is almost two hundred pages?"
Feeling the thickness of the book between his fingers, Xia Nan couldn't help but click his tongue in admiration, marveling at the depth of the adventurer association.
If it is indeed a mega-organization whose influence radiates across the continent, just the depth displayed by this one "Combat Skill Catalog" already surpasses the total sum of seemingly strong small to medium-sized forces, doesn't it?