Ghosts of Fear Street #12: Night of the Werecat (R.L. Stine)
Wendy loves cats, but her parents absolutely forbid her from having one. Luckily, her best friend Tina has a Siamese named Shal that she gets to see. While trying to work on her gymnastics, she falls, which gives this chick Nancy the chance to talk smack to her. Nancy is allergic to cats but knows that Wendy loves them and makes some crack about how she should take a lesson from them. Tina and Wendy go to some cat show and check out the vendors area. Tina warns her that her mom told her not to buy any more cat crap, but she sees a cool little shop and wanders inside. The owner, Mrs. Bast, has everything cat you can name, and she has a display of jewelry and trinkets priced at $5. Wendy finds a really cool black cat pendant with a white spot on its face. Mrs. Bast grabs it from her, says it isn't for sale, and claims that it came from her private collection. She also warns them that it will turn the wearer into a werecat. Wendy waits until she's distracted, leaves a $