From Muppet Wiki

One night, Bear is out talking to his friend Luna. He wonders if Luna ever gets lonely being by herself at night while everyone else is sleeping. Luna helps him to see that she actually has plenty of nighttime friends.

This board-book is fully illustrated, as opposed to some which combine illustrations with photographs of the characters from the show. This book also glows-in-the-dark and includes the following instructions for use:

"Expose each page to a bright lamp for a few minutes. Then turn out the lights to see the pages glow in the dark! After the book has been 'charged' for the first time, you can use a flashlight to recharge the glow-in-the-dark pages."