From authors Stephanie Calmenson and Magic School Bus author Joanna Cole comes the fourth adventure of Allie and Amy, two friends who help a new friend in this silly, fun-to-read Aladdin QUIX chapter book that's perfect for emerging readers!

Best, best friends Amy and Allie do absolutely everything together. It's almost Halloween and this dynamic duo are sure they will win the costume party prize, but when they see a little friend in need, they must decide whether to help him or get to their party on time.