Funny how everything you know can change in a single day... For me, this happened by receiving a strange book via mail for my birthday. A letter from an unknown 'uncle' came with it, explaining the book would let me reveal parts of me I never thought about.
I was curious when I opened the cover. A little cloud of dust came out of it, instantly making me dizzy. On the page was a small tribal tattoo design, symbolizing a fennec woman. She looked pretty cute to me, making me a bit horny somehow. My gaze looked around the page to see inscriptions... And the little woman followed my gaze, waving back. I gasped as it moved... and even more as it started to grow up and change... The little girl grew twice her size on the page and... soon enough, it became a full copy of me.
''W-what...?'' I exclaimed in a girly voice. I took a hand to my mouth only to realize both were already changing. My hand had paw pads and my nails had become small claws while my face... was longer than usual. My field of vision blurred a bit and I let go of the book, staggered. My nose appeared in front of me, no longer human. I had a feeling of pulling on my ears and a push on my entire being. A furry coat was already covering me when I saw myself in the mirror. Only then was it truly made clear what was happening. I looked like the woman more and more as seconds passed. More feminine too as big mounds of flesh bulged outwards under my shirt... which had become baggy.
My frame was shrinking and soon, I was the woman. A sense of pulling inwards at my crotch and outwards at my tailbone revealed a tail and... a vagina. I giggled as I wagged the tail and poked myself at multiple places. The pushes intensified and a 'force' took my gaze to the mirror, where only my head now appeared as opposed to half my body. From 5'3'', I had shrunk to a mere 3' tall in a few seconds.

So here is a wonderful piece of art from   blackshirtboy that ended up starting a whole world for me and   jsscastro7 . ''Olivia'' as shown here still had the book in hand... And she saw a few uses for it. It wasn't named ''Pranks 101'' for no reason after all!