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 suspenseful adventure will surely be a hit among Arthur fans.

This book features in the following series: Arthur, Arthur Chapter Books .

There are 64 pages in this book. This is a chapter book. Publishers market early chapter books at readers aged 6-10 years. This book was published 2012 by Little, Brown & Company .

Marc Brown is the creator of the bestselling Arthur Adventure book series and codeveloper of the number one children's PBS television series, Arthur. He has also created a second book series, featuring D. W