After Arthur calls Francine a marshmallow, she refuses to speak to him.
Then Mr. Ratburn pairs them up for a homework project. They reluctantly
go to the library for research-and find themselves locked in once the
library closes. Will Arthur and Francine set aside their differences and
work together to find a way out? In chapter-book format, for children
who are ready to read on their own, this supenseful adventure will
surely be a hit among Arthur fans.