Name: Karen's Chicken-Pox
Author: Ann M. Martin
ISBN: 9780590523820

About This Book

From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation!Stay away, spots! Halloween is coming! There will be a party at school. and Karen, Hannie, and Nancy have planned the best costume ever. Then Karen's little sister gets the chicken pox. It is very contagious. Karen does not want to catch chicken pox. If she does, it will ruin Halloween. And that would be really scary!