The Spy That Keeps On Giving

Oto will tell you to go to the Bonta library, so your destination is pretty obvious. Once you step onto the library map at [-36,-56] you will immediately start a fight with four Satiated Whitish Fang, 500hp each. They're basically a slightly buffed version of regular Whitish Fangs. Once the battle is over, go inside the library to talk to Bontarian Tactician in the upper right corner. You'll have the choice to either tell him to leave town or pay him 50,000 kamas; I told him to leave town so I don't know what the other options do. Go back to Oto Mustam, who will congratulate you and send you... right back to Bonta library. The reward for work well done...

Anyway, get on back to the library and click on the fallen book in the upper right corner, which will reveal that Roy Sigfred is responsible for training the Whitish Fangs. Armed with this information, go down one map to the pet market and confront Roy. Ask him about the Whitish Fangs, suggest Danathor won't keep his word and then bribe him with 2,000 kamas to recieve Canine Training Technique (hint: it involves punching). Bring that document back to Oto, and on to the next quest.