IF you haven't read Joanne Harris's earlier novel, Chocolat, in which Vianne Rocher and her daughter Anouk created a scandal in the small French town of Lansquenet-sous-Tannes by opening a chocolaterie during Lent, it doesn't really matter. You'll pick up the threads quickly enough in The Lollipop Shoes. Into their lives blows Zozie de l'Alba in her spangle-heeled, lollipop shoes - beautiful, flamboyant and everyone's best friend. However, Zozie is not what she seems. She is a shape-shifter and an identity thief, a 21st-century witch who is just as likely to use the Internet as charms and magic to find out what she needs to know.