Muppet Press/Holt, Rinehart and Winston 1984
Everything is set for Boober's birthday party and all the Fraggles are ready for a party, when disaster strikes! Gloomy Boober and bubbly Red are trapped by a cave-in, and its up to their friends to get them out. As the air gets thinner and thinner, the Fraggles are forced to overcome their differences and discover true friendship.