Under the Magician's Spell

Wikipedia The reader, little sister Joanie, and best friend Sid go to the mall, but Joanie runs into a magic shop. She steals a magic book of magical spells while you are distracted. Later you come to know that the shop owner is an evil magician who wants his book back or he will make Joanie disappear into thin air. "Bad Hare Day" is mentioned. http://en.wikipedia.org/wiki/Give_Yourself_Goosebumps