The amount of stuff in this book boggles your mind. How had anyone created something so huge? Eventually, you see a section about panthers and turn there. You've always liked panthers, so this would be a good place to start.
Seeing the panther paw print inked out on the page, you put your hand on it. Suddenly, you feel like an electric shock is going through your body. "Auuuugh!" you scream as you fall to the floor, writhing in pain. As the effects subside, your body starts to tingle uncomfortably. Slowly you start to get up as your skin starts to itch. "Ugh..." you groan.
As you scratch an arm, you see coarse black hairs sprouting all over your hands. You gasp in shock as the hairs grow thicker, spreading up your arms and chest. Raising up a hand, you see your nails darkening and sharpening into claws, and rough, black pads form on your palms. "What's happening to me?"
You furiously scratch your chest as the itching intensifies, then rip through your shirt with your claws, revealing that your chest is completely covered with soft, black fur. You groan as you feel the fur spread. Suddenly, a jolt goes through your mouth; you yelp and clench your teeth in pain as your canines sharpen into fangs.
Your feet start to become covered with fur. You scream in pain as they start to elongate; yanking your shoes off, you watch them reform into a digitigrade, becoming more paw-like. Your back cracks painfully, forcing you to hunch over. Then, you feel prickling all over your face as the fur sprouts all over your head. You growl as your ears grow pointed and shift to the top of your head, and whiskers grow around your mouth. Suddenly, pain shoots through your jaw. You scream once more, grabbing at your face with your paws as it elongates into a large muzzle. The transformation finishes as a long, black tail grows from your backside.
Slowly, you get to your paws, now a full-grown black panther.