Book excerpt: Jack-Jack, the world's coolest dog, shares his secrets of how to train his human in his second adventure. Humans may think they train us, but I reveal us dogs are the ones training you humans, especially when gravy bone treats are involved. My human has a lot to learn. If he really does want that stick, why does he insist on throwing it away every time I return it to him when we're having walkies? Weird behaviour! We won't be playing 'Fetch' again!