"HA HA HA HEE-HAAWW!!"
...a donkey.
Nicola covered her mouth, feeling it become longer, her nostrils widening, becoming a muzzle. Her ears stretched and slightly drooped down as her fur started to cover her ears and face, going down to her body. Her spine extended, becoming a tail that automatically started to sway like it had a mind of it's own. Her shoes ripped apart, revealing her new hooves. Her hands started to follow, as four fingers and a thumb turned into two hoof-like fingers and a hoof-like thumb on each hand. She looked like a donkey. She still stood up like a human. Nicola looked at every change that James cursed her with. "WHAT DID YOU DO TO ME?!"
James panicked to find an answer to her question "I-I just r-read the book, I-I didn't know that this was going to happen to you". Meredith just chuckled away at this beast that once was a human "I knew you would like your new form, it rather suits you since you destroyed my things, you jackass!"
Nicola was cross and brayed in anger "Alright, we've done your thing and I've had enough. Change me back! NOW!". James flipped through the book seeing if he could change her back. Meredith started to chuckle again "Oh, but you are not finished yet. He still has to do another curse to prove if I should turn you back and let you go free". Nicola was shocked "ARE YOU KIDDING ME?! YOU SAID WEEE-HAAAW!!" Nicola stopped talking, she didn't want to bray again, so she accepted the fact that they had to use the book again.
James started to flip through, not looking at what page he was on and started to read the chapter that he had landed on.