Sticker Girl and the Cupcake Challenge Author:Janet Tashjian Jump into Book 3 of this magical middle grade adventure series with Sticker Girl Martina Rivera! — Bonus feature: Sticker sheet featuring the magic stickers from Book 3 packaged with the book.A gumball machine robot. — Two adorable (and creative) kittens. — An unruly ant farm.These are just a few of the new stickers waiting to be peeled off of Mart... more »ina Rivera?s new magical sticker sheet and SPRING TO LIFE. Student council is keeping Martina busy with a bake sale and cupcake-savvy Bev is excited to help out. The girls advertise their delicious creations and are thrilled to be invited to participate in a web show baking contest. Can Martina balance school and a ruthless cupcake competition, all while keeping her stickers in check? Or is this a recipe for disaster?A ChristyOttaviano Book« less