Equip the skill book the man gives you. Next, upgrade the skill by pressing B then upgrading it to as many skill points as you have. Drag the Tame skill to a number (for example, 1, 2, 3, 4, 5, 6, 7, 8, 9). Click the button at the bottom right of the screen, then click the auto/manual attack button. It is on manual when there is only one sword. Then, preferably attack a black wolf with a weapon until its health (which you can view by highlighting the red bar under its name) is about half gone. Switch to your fists and weaken it to about 15-10 HP, then right-click the skill "Tame". Note: This sometimes will not work. The HP remaining differs with the animal you are trying to tame.