The Perfect Formula (Rugrats Chapter Books)

When Tommy and his friends begin to fear that a crook is after them in order to steal baby Dil's formula, they devise a cunning plan that will chase the crooks from their home and keep them away forever. Original.

Sarah Willson has written more than eighty children's books, many of them about the Rugrats! She once worked as a newspaper cartoonist, and has also been a semiprofessional basketball player. When she was a kid, Sarah dreamed of becoming an inventor -- just like Stu. She also likes to cook, so writing this book about inventors and cooking was a lot of fun. She lives in Connecticut with her husband, three small children, and two large cats. In between writing funny stories, Sarah enjoys inventing ways to get her children to eat their vegetables.