Quest 273

Walkthrough

 * Speak to Kraha (クラハ) inside of the Monster User House at C2 to receive the quest.
 * You need to slay a total of 30 different types of monsters. This is retroactive, so if this is completed, talk to Kraha again. You can find how many types of monsters you've slain in your Records (せんれき) menu, and then going to Defeated Monster List (討伐モンスターリスト). You will see "Unique Monsters Defeated" (倒したモンスターの種類) which is your total.
 * Kraha will tell you to purchase any Monster Master scouting book from the corresponding vendor. There is one right outside the Monster User House. It doesn't matter which one you buy, so long as its icon has a picture of a paw print on it, and the description will say "For MON only."
 * Go back and speak to Kraha to complete the quest.