This book is follow up to Charlotte the Scientist is Squished.

Charlotte is excited that Grandpa has moved in with her and her family. He visits her lab daily until the day he falls ill. Along with other forest creatures, Charlotte wants to find a cure. The book follows along as Charlotte does all the things that scientists do. Does she find the cause of the illness, discover the cure, and heal her Grandpa?

There is a glossary in the back of the book.